Add upgrade jinja variable

The patch adds "upgrade" jinja variable
for manila formula to be similar to the rest
of formulas

Change-Id: If9da7355b50243de37106b357187cd07eda4b21d
diff --git a/manila/map.jinja b/manila/map.jinja
index 606a4ca..24f62ff 100644
--- a/manila/map.jinja
+++ b/manila/map.jinja
@@ -92,3 +92,5 @@
       'cacert_file': cacert_file,
     },
 }, merge=pillar.manila.get('client', {})) %}
+
+{% set upgrade = pillar.get('manila', {}).get('upgrade', {}) %}