python - pq: Get rid of the superfluous 'Ignition' message.

Log Message:
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Get rid of the superfluous 'Ignition' message.

Instead, store the priming messages in the 'ignition' attribute. This helps to
avoid the confusion that client3.Ignition created.

(Also, 'PANIC' is also FATAL; we may get panic messages!)

[Something more formal should probably be drawn; xact.ignition is fine for now]

Modified Files:
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pq/src:
client3.py (r1.13 -> r1.14)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/src/client3.py.diff?r1=1.13&r2=1.14)
pq/test:
client3.py (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/pq/test/client3.py.diff?r1=1.7&r2=1.8)