Update _3gpp-ns-nrm-common.yang, added ProvisioingRuleGrp

  typedef DeterminCommAvailability {

    type Support-enum;

  }

  grouping ProvisioningRuleGrp {

    description "represetns the information that is captured in a 

    provisioning rule from a network slice or network slice subnet

    provisioning MnS consumer. Provisioning rules are associated with

    a particular ServiceProfile or SliceProfile and are part of the

    complete set of requirements to be fulfilled by network slice or

    network slice subnet MnS producer.";

    leaf ruleType {

      description "This attribute specifies the type of provisioning rule.";

      mandatory true;

      type enumeration {

        enum INSTANCE_SHARING_RULE

      }

      leaf sharingPolicy {

        description "This attribute specifies sharing policy for an instance 

        sharing rule. In case of selectively shared sharingGroup also needs to be 

        provided."

        mandatory true;

        type enumeration;

          enum SHARED;

          enum NOT_SHARED;

          enum SELECTIVELY_SHARED;

      }

      leaf sharingGroup {

        description "This attribute indicates the group associated with a rule in

        case of selectively sharing. The group name is chosen by the MnS consumerand is treated as an opaque value by the MnS prodcuer.";

        type string;

      }

    }

  } 

}