Config false issue #620

The following have been adjusted to be require-instance false;

In tapi-connectivity.yang
- connection-end-point-ref
- switch-control-ref
- switch-ref
- route-ref

In tapi-common.yang
- profile-ref

In tapi-topology.yang
- topology-ref
- node-ref

Author: nigel-r-davis

YANG/tapi-common.yang

@@ -154,6 +154,7 @@ module tapi-common {
         leaf profile-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-common:profile/tapi-common:uuid';
+                require-instance false;
             }
             description "none";
         }

YANG/tapi-connectivity.yang

@@ -379,6 +379,7 @@ module tapi-connectivity {
         leaf connection-end-point-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-topology:topology-context/tapi-topology:topology/tapi-topology:node/tapi-topology:owned-node-edge-point/tapi-connectivity:cep-list/tapi-connectivity:connection-end-point/tapi-connectivity:uuid';
+                require-instance false;
             }
             description "none";
         }
@@ -400,6 +401,7 @@ module tapi-connectivity {
         leaf switch-control-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-connectivity:connectivity-context/tapi-connectivity:connection/tapi-connectivity:switch-control/tapi-connectivity:uuid';
+                require-instance false;
             }
             description "none";
         }
@@ -410,6 +412,7 @@ module tapi-connectivity {
         leaf switch-local-id {
             type leafref {
                 path '/tapi-common:context/tapi-connectivity:connectivity-context/tapi-connectivity:connection/tapi-connectivity:switch-control/tapi-connectivity:switch/tapi-connectivity:local-id';
+                require-instance false;
             }
             description "none";
         }
@@ -420,6 +423,7 @@ module tapi-connectivity {
         leaf route-local-id {
             type leafref {
                 path '/tapi-common:context/tapi-connectivity:connectivity-context/tapi-connectivity:connection/tapi-connectivity:route/tapi-connectivity:local-id';
+                require-instance false;
             }
             description "none";
         }

YANG/tapi-topology.yang

@@ -346,6 +346,7 @@ module tapi-topology {
         leaf topology-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-topology:topology-context/tapi-topology:topology/tapi-topology:uuid';
+                require-instance false;
             }
             description "none";
         }
@@ -366,6 +367,7 @@ module tapi-topology {
         leaf node-uuid {
             type leafref {
                 path '/tapi-common:context/tapi-topology:topology-context/tapi-topology:topology/tapi-topology:node/tapi-topology:uuid';
+                require-instance false;
             }
             description "none";
         }