Fix PE1548, PE1547.

PE1547:
In certain cases for late sorted inserts we built the insert stmts by going through a string buffer
rather than utilizing the generic sql.  This caused special characters to be converted twice and thus
rendered garbage.  Arrange for late sorted inserts to always use generic sql.

PE1548:
The feature planner rewrite slightly modified the behavior of the session rewrite.  Make sure that
when building the adhoc result set we use the original projection metadata info, not any copied info.
Fix for PE-1546.
Merge branch 'kanzaros' into kanzaros_plan
Fix for PE-1545.
Fix for PE-1546.
Merge branch 'master' of github.com:Tesora/tesora-dve-pub
[maven-release-plugin] prepare release v1.6.0
[maven-release-plugin] prepare for next development iteration
License header fixes.
[maven-release-plugin] prepare release v1.6.0
[maven-release-plugin] prepare for next development iteration
Fix for PE-1541.
Merge branch 'master' of github.com:Tesora/tesora-dve-pub
Merge branch 'master' into mavenRelease
[maven-release-plugin] prepare release v1.6.0
[maven-release-plugin] prepare for next development iteration
Arrange for show external services to also show the service config string.
Modify the external service test to clean up before it runs to allow repeatable runs.
Add a few more tests for the output of show external services.
Add a catalog upgrade for the extra column in the information_schema.external_services table.
Merge branch 'master' into kanzaros
Fix for PE-1540.
Fix for PE-1554.