Specify the right local effects on the optional match pipe
Merge pull request #3084 from jakub-/optional-match-eagerness

Specify the right local effects on the optional match pipe
Merge branch '2.1-maint'

Conflicts:
	community/cypher/cypher-compiler-2.2/src/main/scala/org/neo4j/cypher/internal/compiler/v2_2/executionplan/builders/OptionalMatchBuilder.scala