Merge branch...

Merge branch 'TS28.623_Rel18_CR0437_change_managedelement_to_add_EC_mapping_rule_reference' into 'Integration_Rel18_SA5_157_YANG'

TS28.623_Rel18_CR0437_Correct _wrong_CR _number_in _managed_ element _YANG _file

See merge request !1387