python - be: Add trigger tests.

Log Message:
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Add trigger tests.

Added Files:
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be/test/expected/80:
trigger (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/test/expected/80/trigger?rev=1.1&content-type=text/x-cvsweb-markup)
be/test/sql/80:
trigger (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/test/sql/80/trigger?rev=1.1&content-type=text/x-cvsweb-markup)