deprecating grab_file_lock configuration setting
Fixed some high-prio warnings, courtesy of findbugs. One missing hashcode implementation, one incorrect equals implementation for paths and one confusing loop.
Changed so index queries and all-node queries use Iterator instead of Iterable
Minor Cypher optimizations

o Smarter node/relationship property handling
o Does not produce ColumnFilterPipes unless necessary
o Does not produce ExtractPipes unless necessary
Merge pull request #551 from lassewesth/grabfilelock

deprecating grab_file_lock configuration setting
Merge pull request #553 from systay/lazy-idx-all-nodes

Changed so index queries and all-node queries use Iterator instead of Iterable
Merge pull request #554 from systay/optimisations

Minor Cypher optimizations
Fixes #489 - CREATE UNIQUE does not work as expected inside FOREACH
Merge pull request #555 from systay/489

Fixes #489 - CREATE UNIQUE does not work as expected inside FOREACH
Serving learnRequests now sets the ConversationId properly, solves some serious bugs
Fixes error in logic on concurrent cluster creation cases. Enables corresponding test.

Discovery on which instance should start the cluster is done now properly, allowing cases where
 ourself is not included in the initial_hosts setting.

Enables test that was flaky, probably fixed by this change