Branched 1.7.5 hotfix
Fixed issue #2461 Create Edge query doesn't take parameters for subqueries
Merge branch 'orientdb-2461-query-parameters' into 1.7.5
Issue #2411 was fixed.
Merge remote-tracking branch 'origin/1.7.5' into 1.7.5
Fixes #2511: make sure cluster is removed from polymorphicClusterIds