Add protobuf support for metaclusters and virtual switches
Add protobuf support for metaclusters and virtual switches

Addresses-Issue: Jira/AQUILON-1659
Change-Id: I73823f8108940d1ce287b58aee2c12a6783cc629
Reviewed-by: Priya Joshi <3c6cfa6f57440adfc837c4ad04483313acbc2582@morganstanley.com>

quattor/aquilon-protocols,quattor/aquilon-protocols