Add Support in OF Agent and VOLTHA VCORE for supporting adding Tech Profile Reference to the Metadata and support and Remove use of Table ID for Tech Profile Reference.

OF Agent needs to add support for the metadata write instruction and the Flow decomposer needs to support Tech Profile Reference in metadata instead of using Flow Table ID as reference in Table 1. The metadata information needs to be passed on to the OLT and ONU Adapters.
Also Meter Reference in all Flow Tables needs to be passed to the OLT and ONU Adapters.