python - fe: Use Green Trunk's new base functionality in Connectors and

Log Message:
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Use Green Trunk's new base functionality in Connectors and Fittings.

Also, get rid of the "first connection" when instantiating Connectors. This
provided some convenience by answering some questions prior to actually making
a real connection, but the overhead of that first connection creates is
fantastically undesirable, so displace the solution resolution to the actual first
connection made by the user. While this has the effect of allowing "invalid"
Connectors, it is unlikely to be a impedance on any application--unlike fc.
Additionally, it provides the user with the ability to correct connector
arguments without being forced to create another connector.

Modified Files:
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    fe/src:
        abstract.py (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/abstract.py.diff?r1=1.2&r2=1.3)
        dbapi2.py (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/dbapi2.py.diff?r1=1.1&r2=1.2)
        tracenull.py (r1.16 -> r1.17)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/fe/src/tracenull.py.diff?r1=1.16&r2=1.17)