Clean up local variable usage - Account setup

This does the local var cleanup for the account creation in the following projects:
* Ceilometer
* Glance
* Sahara
* Trove

Change-Id: I67631578f79eeaaf2814db84f0f5c19d93aee4f3
diff --git a/lib/glance b/lib/glance
index 92577d9..de76feb 100644
--- a/lib/glance
+++ b/lib/glance
@@ -165,23 +165,23 @@
 function create_glance_accounts {
     if is_service_enabled g-api; then
 
-        GLANCE_USER=$(get_or_create_user "glance" \
+        local glance_user=$(get_or_create_user "glance" \
             "$SERVICE_PASSWORD" $SERVICE_TENANT_NAME)
-        get_or_add_user_role service $GLANCE_USER $SERVICE_TENANT_NAME
+        get_or_add_user_role service $glance_user $SERVICE_TENANT_NAME
 
         # required for swift access
         if is_service_enabled s-proxy; then
 
-            GLANCE_SWIFT_USER=$(get_or_create_user "glance-swift" \
+            local glance_swift_user=$(get_or_create_user "glance-swift" \
                 "$SERVICE_PASSWORD" $SERVICE_TENANT_NAME "glance-swift@example.com")
-            get_or_add_user_role "ResellerAdmin" $GLANCE_SWIFT_USER $SERVICE_TENANT_NAME
+            get_or_add_user_role "ResellerAdmin" $glance_swift_user $SERVICE_TENANT_NAME
         fi
 
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
 
-            GLANCE_SERVICE=$(get_or_create_service "glance" \
+            local glance_service=$(get_or_create_service "glance" \
                 "image" "Glance Image Service")
-            get_or_create_endpoint $GLANCE_SERVICE \
+            get_or_create_endpoint $glance_service \
                 "$REGION_NAME" \
                 "http://$GLANCE_HOSTPORT" \
                 "http://$GLANCE_HOSTPORT" \