Remove unnecessary zkHosts validation

[patricklucas]

Curator assumes the default ZooKeeper port 2181 if none is specified, so
this validation check is unnecessary.

[yahoocla]

CLA is valid!

[patricklucas]

Also, I wasn't able to run the tests after importing the project into IntellIJ because of this one conspicuous error. Not sure what that's about.

Error:(21, 21) object index is not a member of package views.html
      Ok(views.html.index(errorOrClusterList))
                    ^

[patelh]

This happens in IntelliJ since the views aren't rendered. If you run sbt clean compile or activator clean compile, the views will be generated. Then you can run the test in IntelliJ.

[patricklucas]

That indeed fixed the view generation problem, but IntelliJ reports "0 test class found in package" when I execute "Run 'All Tests'".

I ran each test file manually and found this failing test.