add lib/infra

move the infrastructure projects to a dedicated lib/infra, which
gives us access to this during grenade upgrade tests.

Change-Id: I1e832792b61d41ad290b4b2ab26fe664e710cebd
diff --git a/stackrc b/stackrc
index 3e93d23..ec9380c 100644
--- a/stackrc
+++ b/stackrc
@@ -136,6 +136,10 @@
 NEUTRONCLIENT_REPO=${NEUTRONCLIENT_REPO:-${GIT_BASE}/openstack/python-neutronclient.git}
 NEUTRONCLIENT_BRANCH=${NEUTRONCLIENT_BRANCH:-master}
 
+# consolidated openstack requirements
+REQUIREMENTS_REPO=${REQUIREMENTS_REPO:-${GIT_BASE}/openstack/requirements.git}
+REQUIREMENTS_BRANCH=${REQUIREMENTS_BRANCH:-master}
+
 # storage service
 SWIFT_REPO=${SWIFT_REPO:-${GIT_BASE}/openstack/swift.git}
 SWIFT_BRANCH=${SWIFT_BRANCH:-master}