QPID-4924: Updated the Python examples to work with the Swig bindings as well

Moved the pure Python examples below the bindings directory

Added default values for Python examples

The reconnect-limit options for drain and server did not have default
values assigned to them. This caused them to fail to run when usin the
Swigged bindings.

Added the console Python example.

Changed release.sh to grab Python examples from new directory

The examples located below the bindings directory are now included in
both the pure Python libraries as well as the Swigged bindings.
QPID-4952: Repackaged the Swig Python bindings as qpid_messaging

Updated the demos to use this new package.