Update _3gpp-nr-nrm-ecimappingrule.yang

  import _3gpp-common-top { prefix top3gpp; }

  import _3gpp-common-subnetwork { prefix subnet3gpp; }

  import _3gpp-common-managed-element { prefix me3gpp; }

  import _3gpp-nr-nrm-externalgnbcucpfunction {prefix gnbcucp3gpp; }

  import _3gpp-nr-nrm-gnbcucpfunction {prefix gnbcucp3gpp; }

  organization "3gpp SA5";

  contact "https://www.3gpp.org/DynaReport/TSG-WG--S5--officials.htm?Itemid=464";

    uses NGRANECIMappingRuleSetSubtree;

  }

  augment "/me3gpp:GNBCUCPFunction" {

    uses gnbcucp3gpp:;

  }

}