Implement Neutron feature of Extension Show into
OpenStack Client.
Change-Id: Ifecb794838cb3bf8c2466d178345349db3cd4003
Implements: blueprint extension-show
this will better isolate the unit tests from the functional tests.
unfortunately, the "integration" tests had to be lumped into the
"unit" tests since we need the separation in testr.conf
Change-Id: Ifd12198c1f90e4e3c951c73bfa1884ab300d8ded