Start tgtd service after installing the rpm

The later call to tgtadm needs the daemon to be running, and the rpm
package doesn't start it.

Rebased and add a corresponding change for cinder.

Change-Id: Ia72b935575ed8b7c635e8f8edeea835754b2d49f
diff --git a/lib/cinder b/lib/cinder
index f0715a4..5b38719 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -106,6 +106,11 @@
         fi
 
         if sudo vgs $VOLUME_GROUP; then
+            if [[ "$os_PACKAGE" = "rpm" ]]; then
+                # RPM doesn't start the service
+                start_service tgtd
+            fi
+
             # Remove iscsi targets
             sudo tgtadm --op show --mode target | grep $VOLUME_NAME_PREFIX | grep Target | cut -f3 -d ' ' | sudo xargs -n1 tgt-admin --delete || true
             # Clean out existing volumes