Cleaned up creation of default switch flows.
Moved anti-spoof flows to interface egress tables.
Deprecated physical/virtual src table.
Removed TABLE_PHYSICAL_SRC table.
Changed TABLE_VIRTUAL_SRC to TABLE_NETWORK_MAC_LEARNING.
Fixed specs for flow table changes.
Pass ingress broadcast and host destined packets through the interface ingress anti-spoof table.
Fixed goto table for host ingress packets.
Merge remote branch 'origin/master' into refactor-flow-tables
Replaced TABLE_{VIRTUAL,PHYSICAL}_{SRC,DST} with the tables TABLE_NETWORK_SRC_MAC_LEARNING and TABLE_NETWORK_DST_MAC_LOOKUP.
Fixed table name in network specs.
Removed unneeded flow helper methods.
Cleaned up creation of drop flows.
Removed controller flow helper.
Removed obsolete flow types.
Added enable_routing and enable_route_translation.
Cleaned up flow helper.
Cleaned up flow_create.
Added TABLE_LOOKUP_NETWORK_TO_HOST_IF_EGRESS for sending packets out the host interface depending on network.
Use the new lookup table to output physical network flood packets to the host port.