Merge pull request #28 from ssirushchyshyn/master

Monitoring: clear events only for successfully collected components
events
Merge pull request #29 from ssbunyk/master

events
fix modeling event sending for 4.2.3
remove debug condition
Merge pull request #30 from ssbunyk/master

Fix event sending
Replication events added
make only one connection to every database
Merge pull request #31 from ssbunyk/master

make only one connection to every database
Added version property for mysql server
Added version column in UI
Merge remote-tracking branch 'upstream/master'
Modified unit tests for modeler according to modifications