Refactoring: one GerritHandler instance that handles multiple GerritConnections.

Add isServerInteresting check in GerritTrigger.
Remove unused serverName field in GerritProject.

Change-Id: I938d199e542f06c9fc7d3b50615618ae7f2a6fc9
Move initializeProvider to isServerInteresting.

Remove repetitive code.

Change-Id: I0745ad89702f26abe0d6154230487a8b1b936277
Unit test for class GerritQueryHandler

Change-Id: I65e503f130a524083bd05edbcfac8a808860510b
Added support for query full commit message.

Added params if --commit-message should be appended to the command call.
The change is compatible with all old behavior, what unit test show.

Change-Id: I02653ee3b1c1eaeec283f279501d7400e967adfe
Merge pull request #91 from mathieu-wang/one-gerrit-handler

Refactoring: one GerritHandler instance that handles multiple GerritConn...
Merge pull request #92 from slawekjaranowski/master

Support for query full commit message from gerrit and unit test for GerritQueryHandler