- update gitlab ci configuration
- add "golint" make target and remove old ones
- update vendors to get v3 for proto
- minor refactoring and some code cleanup
-- introduce initDomainOp() to handle generic startup for client domain ops
-- rename "rc" to "client"
-- drop all client locks
-- address all the warnings that golint surfaced

Signed-off-by: Chris Patterson <cjp256@gmail.com>