rewrite query5 api impl for slightly more efficiency (i hope)
Merge branch '2.0-maint' into 2.1-maint
Merge branch '2.1-maint'

Conflicts:
	data-import/src/main/java/com/ldbc/snb/interactive/neo4j/interactive/embedded_api_steps/Neo4jQuery5EmbeddedApi.java
remove comments in query5 api impl
Merge branch '2.0-maint' into 2.1-maint
Merge branch '2.1-maint'