Update `redundancy` in general.j2

with the "replace" to catch config drifts.

geant/gap_ansible/roles/bc_templates/routers/nokia/general.j2

@@ -60,7 +60,7 @@
         </server>
     </twamp>
   </test-oam>
-  <redundancy xmlns="urn:nokia.com:sros:ns:yang:sr:conf" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:nokia-attr="urn:nokia.com:sros:ns:yang:sr:attributes">
-      <rollback-sync>rollback-all</rollback-sync>
+  <redundancy xmlns="urn:nokia.com:sros:ns:yang:sr:conf" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:nokia-attr="urn:nokia.com:sros:ns:yang:sr:attributes" alu:operation="replace">
+      <rollback-sync>{{ nokia_rollback_sync | default('rollback-all') }}</rollback-sync>
   </redundancy>