LU-1014 mountconf: MGS should process parameter config

LU-1014 mountconf: MGS should process parameter config

MGS doesn't have llog config of its own, but it should process
<profile>-params config which is global parameters for the whole
system.

Signed-off-by: Lai Siyao <laisiyao@whamcloud.com>
Change-Id: I62147dfff17f28c537d75652b49ed3582b0fa64c
Reviewed-on: http://review.whamcloud.com/2139
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Mike Pershin <tappro@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>