Add oslo.utils and oslo.serialization

Install the oslo.utils and oslo.serialization libraries from source so
the gate tests run against master.

Change-Id: I2cb35c9dfd18588e4caa11134e6a34d83324e136
diff --git a/stackrc b/stackrc
index ad7da6c..b86c364 100644
--- a/stackrc
+++ b/stackrc
@@ -240,6 +240,14 @@
 OSLORWRAP_REPO=${OSLORWRAP_REPO:-${GIT_BASE}/openstack/oslo.rootwrap.git}
 OSLORWRAP_BRANCH=${OSLORWRAP_BRANCH:-master}
 
+# oslo.serialization
+OSLOSERIALIZATION_REPO=${OSLOSERIALIZATION_REPO:-${GIT_BASE}/openstack/oslo.serialization.git}
+OSLOSERIALIZATION_BRANCH=${OSLOSERIALIZATION_BRANCH:-master}
+
+# oslo.utils
+OSLOUTILS_REPO=${OSLOUTILS_REPO:-${GIT_BASE}/openstack/oslo.utils.git}
+OSLOUTILS_BRANCH=${OSLOUTILS_BRANCH:-master}
+
 # oslo.vmware
 OSLOVMWARE_REPO=${OSLOVMWARE_REPO:-${GIT_BASE}/openstack/oslo.vmware.git}
 OSLOVMWARE_BRANCH=${OSLOVMWARE_BRANCH:-master}