HPCC-9249 Return user/IP for paused queue to WsSMC/Activity response

This fix allows a user add some comment when the user
pauses/stops/resumes a queue through WsSMC service. The comment, as
well as user name, IP, and time, will be stored and returned as a
part of WsSMC/Activity response.

Signed-off-by: Kevin Wang <kevin.wang@lexisnexis.com>