Bug fix pyparsing upgrade for python quantum client

The python-quantumclient package may not include the correct
version of pyparsing in its dependencies, requiring us to
ensure that it is upgraded to the latest version prior to usage.
Needed to correct tests to pass openstack-common 0.4.0 changes.

Change-Id: Ia8507a5fe94322ff3106d12d161dcedf2ee19fdd