[ONOS-4762][ONOS-4601]Grammar for meta data +  Union defect fix

Change-Id: I8f78127e5b292cca6a79b32d496c2602c9105acd
22 files changed
tree: 794d23242f0168d6a02a3c69002c69fb9b2cd407
  1. datamodel/
  2. plugin/
  3. pom.xml