Update _3gpp-ns-nrm-common.yang network slice rules

  typedef DeterminCommAvailability {

    type Support-enum;

  } 

  grouping ProvisioningRuleGrp {

    description " represents the information that is captured in a 

      provisioning rule from a network slice or network slice subnet

      provisioning MnS consumer. Provisioing 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 attribtue specifies the sahring 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 SELECTIVILY_SHARED;

    }

    leaf sharingGroup {

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

      case of selectivility sharing. The group name is chosen by the MnS consumer

      and is treated as an opaque value by the MnS producer.";

      type string;

    }

  }

}