Fix is_n-cell-enabled

devstack-gate just adds the n-cell to the list of enabled_services and
devstack does the rest.

Change-Id: I1d7f8d085a5f46078131f0f6f670e929ec63f805
diff --git a/lib/nova b/lib/nova
index 8240813..5cc94ec 100644
--- a/lib/nova
+++ b/lib/nova
@@ -139,7 +139,7 @@
 # Test if any Nova Cell services are enabled
 # is_nova_enabled
 function is_n-cell_enabled {
-    [[ ,${ENABLED_SERVICES} =~ ,"n-cell-" ]] && return 0
+    [[ ,${ENABLED_SERVICES} =~ ,"n-cell" ]] && return 0
     return 1
 }