Remove incorrect super() call

extension.ShowExt.get_parser called super() with the *parent* class,
skipping the parent's own get_parser.  This is quite surprising without
any additional comments to explain the situation.

The only difference between the two get_parsers is the string that
appears in the usage help text (EXT_ALIAS vs EXTENSION).  Rather than
improve the above super() call, this change removes the specialised
ShowExt.get_parser() implementation entirely since it appears the
generic version is sufficient.

Change-Id: I76b901d6a27fbe6f103baf2f03ea17912123a46b
Print exception when verbose is over DEBUG_LEVEL

Change-Id: I8a2010332be0acfe6762bf3190248fe17f42cadb
Closes-bug: #1353496
Fix typo in cli help

The help message for neutron floatingip-disassociate should say
the argument is the ID of the floating IP to disassociate

Change-Id: I4564d546ca269ab05199a51ffd11678237a4d56f
Merge "Remove incorrect super() call"
Merge "Fix typo in cli help"