PDI-3027 - Impossible to clear Instance Name for MS SQL Server connection
What was done
1) changed logic that affected instance name change.
2) changed behavior checking empty string
PDI-3027 - Impossible to clear Instance Name for MS SQL Server connection

What was done
1) changed logic that affected instance name change.
2) changed behavior checking empty string
3) removed commented out code
Merge pull request #111 from kolinus/PDI-3027

PDI-3027 - Impossible to clear Instance Name for MS SQL Server connectio...