add bsn_counter request reply
separate bsn_port_counter from bsn_vlan_counter
fix typos
add bsn_port/vlan_counter_stats_request/reply
simplify variable names
add test data bsn_port_counter_stats_reply.data
add prefix to avoid name collision
replace tabs with spaces
Merge into master from pull request #149:
add bsn_counter request reply (https://github.com/floodlight/loxigen/pull/149)