Refactor existing model sync code into separate package and classes so it can be used by both sync(current) service and new watchdog process

Method: org.onap.cps.ncmp.api.impl.NetworkCmProxyDataServiceImpl#syncAndCreateSchemaSet

Need new package(s) for Synchronization code:

• org.onap.cps.ncmp.api.impl.sync.model
• org.onap.cps.ncmp.api.impl.sync.data (future not in scope here but explains why we have sync.model)

Possible have separate/multiple methods

syncAndCreateSchemaSet(yangModelCmHandle);
createAnchor(yangModelCmHandle);

currently test is semi-separate in tis spec: org/onap/cps/ncmp/api/impl/NetworkCmProxyDataServiceImplModelSyncSpec.groovy

A/C.

• sync  method(s) in a separate class that can also be more easily tested