Fixed issue #2691
Merged last commits
Supported getType() in Vertex and Edge.
Enhance OStringSerializerHelperTest by new tests
Changed contract to OCollection and RidBag remove() to return boolean
Fixed issue #2800
Merge branch 'develop' of https://github.com/orientechnologies/orientdb into develop
Merge pull request #2805 from PhantomYdn/enhance-stringserializer-tests

Enhance OStringSerializerHelperTest by new tests
Caught exception on connection close avoiding the stack trace
Merge branch 'develop' of https://github.com/orientechnologies/orientdb into develop