PDI-11489 - Mapping/Simple Mapping steps forces to /null during usage Specify by reference
[PDI-11461] Hypersonic db has no type TEXT
PDI-11394 - Empty database browser dialog appears after unsuccessful
connect to DB

Fix behaviour with empty database explorer shown for not success
connections.
Introduced new interface IUiActionStatus and enum UiPostActionStatus to
have ability to read status for reflective calls with exceptions
suppressions.

Since Xul is not widely implemented and behaviour described in bug is a
private case, this fix only applied for XulDatabaseExplorerController
and
XulDatabaseExplorerDialog classes for 'discover table' ui calls.

junits added into /test folder.
PDI-2107 - Stream Lookup options KeyValueAreInteger and SortedList should be disabled if Preserve Memory is unchecked.

Fixed UI.
To 2 kinds of memory preserve checkbox 'Preserve emmroy' should be
checked. This will reflect real code behaviour for this cases.
PDI-11274 - Mapping logging jira has got lost

There are implementation and unit tests.
PDI-11042 - Execute transform remotely to slave server fails if Web App name not set to "pentaho-di"
[PDI-11423] Integration test org.pentaho.di.core.util.StringEvaluatorTest fails
Merge pull request #424 from pavel-sakun/PDI-11489

PDI-11489 - Mapping/Simple Mapping steps forces to /null during usage Specify by reference
Merge pull request #444 from prakapenka/PDI-11394

PDI-11394 - Empty database browser dialog appears after unsuccessful connect to DB
Merge pull request #426 from stepanovdg/PDI-11461

[PDI-11461] Hypersonic db has no type TEXT
[PDI-11490]: Job executor step "specify by reference" filters out all JOB stay only TRANSFORMATION (Should be conversely)

There are fix and unit tests.
Merge pull request #401 from TatsianaKasiankova/PDI-11490

[PDI-11490]: Job executor step "specify by reference" filters out all JOB stay only TRANSFORMATION (Should be conversely)
Merge pull request #447 from TatsianaKasiankova/PDI-11274

PDI-11274 - Mapping logging jira has got lost
Merge pull request #448 from pavel-sakun/PDI-11042

PDI-11042 - Execute transform remotely to slave server fails if Web App name not set to "pentaho-di"
[CLEANUP] Refactoring common JobMeta and TransMeta code up into AbstractMeta
Merge pull request #445 from prakapenka/PDI-2107

PDI-2107 - Stream Lookup options KeyValueAreInteger and SortedList should be disabled if Preserve Memory is unchecked.
Merge pull request #450 from stepanovdg/PDI-11423

[PDI-11423] Integration test org.pentaho.di.core.util.StringEvaluatorTest fails
Merge pull request #456 from brosander/Meta-Refactor-squash

[CLEANUP] Refactoring common JobMeta and TransMeta code up into Abstract...
[TEST]: Fixed RunMapping test
Merge pull request #458 from mattyb149/fix-runmapping-test

[TEST]: Fixed RunMapping test