HSEARCH-1312 Adding test to show that reported errors are unrelated.

- Improving error messages and use consistently the Log interface.
- Simplifying NullEncodingFieldBridge creation
HSEARCH-1312 All SearchFactory instances need to be closed
HSEARCH-1603 Disable Eclipse auto-import of plugins for Felix and ServiceMix
HSEARCH-1604 Resolve compilation problems in sandbox project
HSEARCH-1604 Enabling all modules but having the performance ones return quickly when not running the _perf_ profile
HSEARCH-704 Adding test case for n+1 query problem
HSEARCH-704 Refactoring EntityInfo. Work in progress