Changed _extract_service_catalog to match neutronclient to remove
deprecation warnings when attr is provided without filter_value to
get_urls().
Change-Id: Ic58060bdf50ce1f3834324372f1a375fbd15beb6
Closes-Bug: #1570641
After renaming the service 'servicevm' and 'advsvc' in install file,
functional tests were failing. Now renamed to 'tacker' in all files of
python-tackerclient repo so that functional test wouldn't fail.
Change-Id: I919d77276af72586a20f50239166325adbf9fb11
Partial-Bug: #1524224
