TT#182052 Conditionalize SNMP collective-check OIDs

These are now conditional on a config knob. We should not expect them to
be present of they are disabled.

Change-Id: I2ebc68db597db0fbccf9f990ceab101589a8e914

templates/915_service-snmp.yaml.tt2

@@ -22,8 +22,10 @@ command:
     - "/::cnAddress\\.\\d\\.\\d = /"
     - "/::cnRoleIndex\\.\\d\\.\\d = /"
     - "/::cnRole\\.\\d\\.\\d = /"
+[% IF snmpagent.trees.collective_check == 'yes' -%]
     - "/::ngcpCollectiveCheckResult = /"
     - "/::ngcpCollectiveCheckOutput = /"
+[% END -%]
 [% IF is_mgmt -%]
     - "/::ngcpClusterProvSubs = /"
     - "/::ngcpClusterRegSubs = /"