fixed bug TDI-30384 Unable to extract schema from an AS400 Connection
some change on the TDQ-9624 is making this issue, this commite fixed it.
Merge branch 'maintenance/5.6' of https://github.com/zshen-talend/tcommon-studio-se.git into maintenance/5.6
TUP-2332: add a junit testcase for the changeset.
https://jira.talendforge.org/browse/TUP-2332
Merge pull request #97 from rdubois/maintenance/5.6

TBD-1218: Update the mappings.xml file for Hive and Impala
Merge pull request #82 from zshen-talend/maintenance/5.6

Maintenance/5.6
fixed merge conflict TDQ-9667 Problem to select column for analysis and
to see column
TDI-30278 fix bug: It will be no response then pop up en error when I
click add schema button at last step for Impala db retrieve schema
https://jira.talendforge.org/browse/TDI-30278

Also fix a potential bug for replacing schema to proposed one
TBD-1201: CDH 5.1.3 Hadoop Wizard - Check Services fails
Merge branch 'maintenance/5.6'
TDI-31114: Hive 2 connection in embbeded mode throwing exception to say
not support on windows
Merge remote-tracking branch 'origin/maintenance/5.6'
TDI-30940:improved the context function for SAP wizard.
Merge branch 'maintenance/5.6'
TDI-31069:Error occur when I select update repository connection for SAP
repository schema
    TDI-31069:Error occur when I select update repository connection for
SAP repository schema
TDI-31069:Error occur when I select update repository connection for SAP
repository schema
Merge branch 'maintenance/5.6'
TDI-31176:create context parameter with empty string.
Merge branch 'maintenance/5.6'
TDI-31231:default encoding for context property.