fix systemvm template ambiguity

Author: Paul Angus

source/_global.rst

@@ -25,6 +25,7 @@
 
 .. Latest version systemvm template name
 
+.. |sysvm64-version|     replace:: 4.11.3
 .. |sysvm64-name-xen|    replace:: systemvm-xenserver-4.11.3
 .. |sysvm64-name-kvm|    replace:: systemvm-kvm-4.11.3
 .. |sysvm64-name-vmware| replace:: systemvm-vmware-4.11.3

source/upgrading/upgrade/upgrade-4.11.rst

@@ -34,11 +34,17 @@ working on a production system.
 
 Upgrade Steps:
 
+#. Upload the |sysvm64-version| System VM template if not already using it.
 #. Backup CloudStack database (MySQL)
 #. Add package repository for MySQL connector
 #. Upgrade CloudStack management server(s)
 #. Update hypervisors specific dependencies
 
+.. warning::
+    If you are not already using the |sysvm64-version| System VM template you will need to 
+    upgrade your System VM template prior to performing the upgrade of the 
+    CloudStack packages.
+
 .. include:: _sysvm_templates.rst
 
 Packages repository

source/upgrading/upgrade/upgrade-4.12.rst

@@ -33,16 +33,19 @@ working on a production system.
 
 Upgrade Steps:
 
+#. Upload the |sysvm64-version| System VM template if not already using it.
 #. Backup CloudStack database (MySQL)
 #. Add package repository for MySQL connector
 #. Upgrade CloudStack management server(s)
 #. Update hypervisors specific dependencies
 
-.. THIS LINE COMMENTED OUT AS NOT REQUIRED FOR 4.13
-    include:: _sysvm_templates.rst
+.. warning::
+    If you are not already using the |sysvm64-version| System VM template you will need to 
+    upgrade your System VM template prior to performing the upgrade of the 
+    CloudStack packages.
+
+.. include:: _sysvm_templates.rst
 
-.. note::
-    System VM Template upgrade is not required when upgrading from |version_to_upgrade| to |release|.
 
 Packages repository
 -------------------