Moved ObjectTypes enumeration to TapiCommon mdoel/module
Moved the Alarm/TCA info classes from TapiNotification to TapiOam
model/module which now augment TAPI Notification class (instead of
composition)
Defined new TapiOam extensible enumerations - AlarmConditionName &
PmParameterName for tighter typing (Identity instead of String)
Defined new TapiOam data-type - PmParameter that has PmParameterName
(Identity) and choice different value types (need to be modeled by union
in future)
Defined new TapiOam data-type - ThresholdParameter that has
PmParameter, ThresholdCrossingType, ThresholdCrossingQualifier
The ThresholdParameter is used in both PmThresholdData (OamProfile)
and ThresholdCrossingAlert (Notification)
Augmented TapiEth PmParameterName for G.8052 PmParameter (Statistical
LM/DM) attributes
Deleted the TapiEth ThresholdData augments (both spec & interfaces) &
related diagrams