Fix get_status() to find client.rados text inside of ps command results.

Added port (fixed value for right now in teuthology) to hostname.
Fixes: 7374
Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
Signed-off-by: Warren Usui <warren.usui@inktank.com>
(cherry picked from commit 8200b8a02511e367370d33cb74c3d45ef85fca31)
Fixed get_status() to find client.radosgw fields inside of ps output.

Fixes: 7375
Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
Signed-off-by: Warren Usui <warren.usui@inktank.com>
(cherry picked from commit 8020dcf7791a0f459bae5e8a77d70ff1dc9c60bc)
Use pgrep radosgw to determine if rados gateway is running.

Fixes: 7528
Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
Signed-off-by: Warren Usui <warren.usui@inktank.com>
(cherry picked from commit 5b88856cd25a13842fa8ad0699b84fbdfbc13694)