a-o-i: Add Origin 1.2 Installs

Add Origin 1.2 as one of the available installation options.

utils/src/ooinstall/variants.py

@@ -51,6 +51,7 @@ AEP = Variant('atomic-enterprise', 'Atomic Enterprise Platform',
 
 origin = Variant('origin', 'OpenShift Origin',
     [
+        Version('1.2', 'origin'),
         Version('1.1', 'origin')
     ]
 )