This commit fixes collate regression test --- Written by Koichi Suzuki,
Reviewed and revised by Abbas Butt.
This commit fixes src/test/regress/parallel_schedule, which was not
included in the initial conflict resolution commit 4e601dff.
Fix for inherit test case
This commit fixes objectaddress.c module to hand pgxc_node objects
properly.   Needed to fix event_trigger supporting function
pg_event_trigger_dropped_objects().
This commit supports EVENT TRIGGER in Postgres-XC.

Event trigger will be fired only at the originating coordinator.
Supported statements are the same as in PostgreSQL.

XC-specific DDL does not support EVENT TRIGGER.

Documentation will be supplied in a separate patch after the document
merge is done with PostgreSQL master branch.
This commit fixes event_trigger regression in the merge with PostgreSQL
master branch.
This fixes cluster regression in the merge with PostgreSQL master
branch.
Fixes window regression in the merge with PostgreSQL master branch.
This fixes truncate regression in the merge with PostgreSQL master
branch.
Fix of rowtypes regression test in the merge with PostgreSQL master
branch.
PG 9.3 deparsing code needs the RTE for JOIN in Query::rtable. So, add one while
building the Query structure for the query to be sent to the datanode.
Fixes stats regression in the merge with PostgreSQL master branch.
Fixes xc_triggers regression in the merge with PostgreSQl master branch.
Fixes xc_trigship regression in the merge with PostgreSQL master branch.
Fixes xc_constraints regression in the merge with PostgreSQL master
branch.
Fixes xc_alter_table regression in the merge with PostgreSQL master
branch.
Fixes xc_sequence regression in the merge with PostgreSQL master
branch.
Fixes xc_copy regression in the merge with PostgreSQL master branch.
Fixes point regressin in the merge with PostgreSQL master branch.
Fixes sanity_check regression for the merge with PostgreSQL master
before 9.3 beta.