LU-14031 tests: check client reconnect

LU-14031 tests: check client reconnect

The patch adds test 147 for recovery-small. It checks how often
client reconnects to a server with obd_timeout=200.

HPE-bug-id: LUS-8520
Test-Parameters: trivial testlist=recovery-small env=ONLY=147
Signed-off-by: Alexander Boyko <alexander.boyko@hpe.com>
Change-Id: Id5bd732fe4d949cfa45ea0272f197809cca3290d
Reviewed-on: https://review.whamcloud.com/40297
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Reviewed-by: Vitaly Fertman <vitaly.fertman@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>