Tweak Neo4j config to fix OutOfMemoryError

Attempts to fix:

java.lang.OutOfMemoryError: GC overhead limit exceeded

Refs neo4j/neo4j#9209

From https://neo4j.com/docs/operations-manual/3.2/performance/#page-cache-sizing

You can determine the total memory needed for the page cache by summing up the sizes of
the NEO4J_HOME/data/databases/graph.db/*store.db* files and adding 20% for growth.

Hence, seems that 512m is sufficient for page cache.

hetnet/neo4j/docker/host/run-docker.sh

@@ -3,13 +3,13 @@
 docker run \
  --detach \
  --name=hetionet-container \
- --restart=on-failure:50 \
+ --restart=on-failure \
  --publish=80:7474 \
  --publish=443:7473 \
  --publish=7687:7687 \
  --volume=$HOME/hetionet-data:/data \
  --volume=$HOME/neo4j-logs:/logs \
  --volume=$HOME/ssl:/ssl \
- --env=NEO4J_dbms_memory_pagecache_size=1g \
- --env=NEO4J_dbms_memory_heap_maxSize=512m \
+ --env=NEO4J_dbms_memory_pagecache_size=512m \
+ --env=NEO4J_dbms_memory_heap_maxSize=1g \
  dhimmel/hetionet