prepare for RT support

r8.conf

@@ -154,8 +154,8 @@ variant_as_lookaside = [
     ('HighAvailability', 'AppStream'),
     ("ResilientStorage", "BaseOS"),
     ("ResilientStorage", "AppStream"),
-#    ("RT", "BaseOS"),
-#    ("RT", "AppStream"),
+    ("RT", "BaseOS"),
+    ("RT", "AppStream"),
 #    ("NFV", "BaseOS"),
 #    ("NFV", "AppStream"),
 ]

variants.xml

@@ -290,13 +290,11 @@
       <arch>x86_64</arch>
     </arches>
   </variant>
-  <!-- Not available yet
   <variant id="RT" name="RT" type="variant">
     <arches>
       <arch>x86_64</arch>
     </arches>
   </variant>
-  -->
 
   <!-- Live Variants, loosely borrowed from Fedora
        Usually these variants are set to always be empty -->