Fix heisenbug

[style95]

This is to fix the intermittent test failures.

Description

Intermittent test failures due to heisenbugs increase the CI time and make authors run tests multiple times.

Related issue and scope

• I opened an issue to propose and discuss this change (Intermittent test failure #5015)

My changes affect the following components

• API
• Controller
• Message Bus (e.g., Kafka)
• Loadbalancer
• Invoker
• Intrinsic actions (e.g., sequences, conductors)
• Data stores (e.g., CouchDB)
• Tests
• Deployment
• CLI
• General tooling
• Documentation

Types of changes

• Bug fix (generally a non-breaking change which closes an issue).
• Enhancement or new feature (adds new functionality).
• Breaking change (a bug fix or enhancement which changes existing behavior).

Checklist:

• I signed an Apache CLA.
• I reviewed the style guides and followed the recommendations (Travis CI will check :).
• I added tests to cover my changes.
• My changes require further changes to the documentation.
• I updated the documentation where necessary.

[codecov-io]

Codecov Report

Merging #5027 (8f8d40f) into master (a202538) will decrease coverage by 6.66%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5027      +/-   ##
==========================================
- Coverage   83.52%   76.85%   -6.67%     
==========================================
  Files         195      202       +7     
  Lines        9553     9818     +265     
  Branches      413      416       +3     
==========================================
- Hits         7979     7546     -433     
- Misses       1574     2272     +698     

Impacted Files	Coverage Δ
...core/database/cosmosdb/RxObservableImplicits.scala	0.00% <0.00%> (-100.00%)	⬇️
...ore/database/cosmosdb/cache/CacheInvalidator.scala	0.00% <0.00%> (-100.00%)	⬇️
...e/database/cosmosdb/cache/ChangeFeedConsumer.scala	0.00% <0.00%> (-100.00%)	⬇️
...core/database/cosmosdb/CosmosDBArtifactStore.scala	0.00% <0.00%> (-95.85%)	⬇️
...sk/core/database/cosmosdb/CosmosDBViewMapper.scala	0.00% <0.00%> (-93.90%)	⬇️
...tabase/cosmosdb/cache/CacheInvalidatorConfig.scala	0.00% <0.00%> (-92.31%)	⬇️
...enwhisk/connector/kafka/KamonMetricsReporter.scala	0.00% <0.00%> (-83.34%)	⬇️
...e/database/cosmosdb/cache/KafkaEventProducer.scala	0.00% <0.00%> (-78.58%)	⬇️
...whisk/core/database/cosmosdb/CosmosDBSupport.scala	0.00% <0.00%> (-74.08%)	⬇️
...ore/database/azblob/AzureBlobAttachmentStore.scala	11.53% <0.00%> (-60.58%)	⬇️
... and 23 more

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[style95]

This test is supposed to reuse a container, so I change them to blocking calls.

[style95]

I would re-run all tests multiple times and merge this if there is no further issue.

[style95]

Handling

org.apache.openwhisk.core.limits.ConcurrencyTests > Action concurrency limits should execute activations sequentially when concurrency = 1 STANDARD_ERROR
    org.scalatest.exceptions.TestFailedException: 502 was not equal to 200
    	at org.scalatest.MatchersHelper$.indicateFailure(MatchersHelper.scala:343)
    	at org.scalatest.Matchers$AnyShouldWrapper.shouldBe(Matchers.scala:6919)
    	at common.rest.RunRestCmd.validateStatusCode(WskRestOperations.scala:1165)
    	at common.rest.RunRestCmd.validateStatusCode$(WskRestOperations.scala:1162)
    	at common.rest.RestActionOperations.validateStatusCode(WskRestOperations.scala:244)
    	at common.rest.RunRestCmd.invokeAction(WskRestOperations.scala:1358)
    	at common.rest.RunRestCmd.invokeAction$(WskRestOperations.scala:1331)
    	at common.rest.RestActionOperations.invoke(WskRestOperations.scala:388)
    	at org.apache.openwhisk.core.limits.ConcurrencyTests.$anonfun$new$21(ConcurrencyTests.scala:137)
    	at scala.concurrent.Future$.$anonfun$apply$1(Future.scala:659)
    	at scala.util.Success.$anonfun$map$1(Try.scala:255)
    	at scala.util.Success.map(Try.scala:213)
    	at scala.concurrent.Future.$anonfun$map$1(Future.scala:292)
    	at scala.concurrent.impl.Promise.liftedTree1$1(Promise.scala:33)
    	at scala.concurrent.impl.Promise.$anonfun$transform$1(Promise.scala:33)
    	at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:64)
    	at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:55)
    	at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:92)
    	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
    	at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:85)
    	at akka.dispatch.BatchingExecutor$BlockableBatch.run(BatchingExecutor.scala:92)
    	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
    	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(ForkJoinExecutorConfigurator.scala:49)
    	at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    	at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    	at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    	at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
org.apache.openwhisk.core.limits.ConcurrencyTests > Action concurrency limits should execute activations sequentially when concurrency = 1 FAILED
    org.scalatest.exceptions.TestFailedException: 502 was not equal to 200
        at org.scalatest.MatchersHelper$.indicateFailure(MatchersHelper.scala:343)
        at org.scalatest.Matchers$AnyShouldWrapper.shouldBe(Matchers.scala:6919)
        at common.rest.RunRestCmd.validateStatusCode(WskRestOperations.scala:1165)
        at common.rest.RunRestCmd.validateStatusCode$(WskRestOperations.scala:1162)
        at common.rest.RestActionOperations.validateStatusCode(WskRestOperations.scala:244)
        at common.rest.RunRestCmd.invokeAction(WskRestOperations.scala:1358)
        at common.rest.RunRestCmd.invokeAction$(WskRestOperations.scala:1331)
        at common.rest.RestActionOperations.invoke(WskRestOperations.scala:388)
        at org.apache.openwhisk.core.limits.ConcurrencyTests.$anonfun$new$21(ConcurrencyTests.scala:137)