Remove hard-coded keystone version from setup
Remove hard-coded keystone version from setup

Commit Id229617ec5cf2820c1033fd2c34fc160a75c46d6 recently introduced a
hard-coded identity API version in the setup script. This patch switches
the /v2.0/ to /v$IDENTITY_API_VERSION/ so we can work when v2 is
disabled as well.

Change-Id: Ib6fd666930bf45170f69d5f64ccadf617899f7c7

openstack/ironic,bacaldwell/ironic,NaohiroTamura/ironic,pshchelo/ironic,SauloAislan/ironic,openstack/ironic,NaohiroTamura/ironic,bacaldwell/ironic,pshchelo/ironic,SauloAislan/ironic,devananda/ironic