fix brick checks for validating-server-quorum.t & quorum-validation.t
...and make brick_up_status_1 function more generic.

Also fix a timing issue in
bug-1482023-snpashot-issue-with-other-processes-accessing-mounted-path.t

Change-Id: I797ef4cec5b160aafa979bae7151b1e99fcb48ac
Updates: bz#1603063
Signed-off-by: Atin Mukherjee <amukherj@redhat.com>

To reduce the overall time taken by the every regression job for all glusterd test cases,
avoiding some duplicate tests by clubbing similar test cases into one.

real time taken for all regression jobs of glusterd without this patch is 1959 seconds,
with this patch it is 1059 seconds.

Look at the below document for your reference.
https://docs.google.com/document/d/1u8o4-wocrsuPDI8BwuBU6yi_x4xA_pf2qSrFY6WEQpo/edit?usp=sharing

Change-Id: Ib14c61ace97e62c3abce47230dd40598640fe9cb
BUG: 1530905
Signed-off-by: Sanju Rakonde <srakonde@redhat.com>