pgsql: Remove dependency on ordering in logical decoding upsert test.

Remove dependency on ordering in logical decoding upsert test.

Buildfarm member magpie sorted the output differently than intended by
Peter. "Resolve" the problem by simply not aggregating, it's not that
many lines.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/581f4f9657fc3ab08199d02c0a4ea89c658882a6

Modified Files
--------------
contrib/test_decoding/expected/ddl.out |   50 ++++++++++++++++++++++++--------
contrib/test_decoding/sql/ddl.sql      |    7 ++---
2 files changed, 40 insertions(+), 17 deletions(-)