Updated all UML-Operations/YANG-RPCs to use UUIDs so that it is consistent with the REST CRUD data APIs flavor
used consistent labels (uuid) for the UUID key parameters and fixed parameter type to TapiCommon::Uuid (instead of String)
other minor bug fixes (explicit config=false statements)
UML & corresponding Yang updates to align with PR #439 - created an CentralFrequencyBand datatype and using that in OtsiCapability pac instead of in-lining as in previous Yang commit