[OPENENGSB-3351] ConnectorManager.connectorExists added
ConnectorManager - small adjustments
Merge remote-tracking branch 'upstream/master' into OPENENGSB-3351/check-for-existing-connector
Merge pull request #11 from lkavicky/OPENENGSB-3351/check-for-existing-connector

[OPENENGSB-3351] ConnectorManager.connectorExists added