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-7013] Substitute parameters in regex fields of Validator step
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
[PDI-6900] SwitchCase step: junit tests added
[PDI-6900] Switch/Case Step does not work when trying to use same target
step twice: fix added
Merge pull request #111 from kolinus/PDI-3027

PDI-3027 - Impossible to clear Instance Name for MS SQL Server connectio...
Merge pull request #120 from askdzmitry/PDI-7013

[PDI-7013] Substitute parameters in regex fields of Validator step
Merge pull request #123 from prakapenka/PDI-6900

[PDI-6900] Switch/Case Step does not work when trying to use same target step twice
PDI-10837 - Removing Const.VERSION, making BuildVersion.java first try manifest, then env variables, then fallback to unknown, unit testing logic
Merge pull request #125 from brosander/PDI-10837

PDI-10837 - Removing Const.VERSION, making BuildVersion.java first try m...
PDI-4589 : Execution History - Log table change is only picked up after reopening a transformation or job