Fixed versions in branch-alias
Fixing NelmioSolariumBundle version in composer.json
Adding tests for ClassMetadata::hasEndpoint()
Added ValueConverter processing and services.

- Refactored Processor to make use of the ConverterCollection.
- Added converter service and registered default field type classes.
- Added test cases.

TODO: Update docs!
[HOTFIX] Fixing Type for postRemove callback.
Added enpoint assertions to Extension test.
Adding SOLR integration tests for Solarium client.
Fixed one time commits during flush.
Merge branch 'master' into 2.0