LU-840 tests: Fix conf-sanity.sh test_32b

Fix correct settings debug level
Fix correct mdt.upcall path
Fix mgs node settings to able to connect to correct host
(alternative way to fix it's
- add waiting for export to wait ost<>mgs connection established)

Xyratex-bug-id: MRP-233
Signed-off-by: Andriy Skulysh <Andriy_Skulysh@xyratex.com>
Change-Id: I4bc21fe4abfff0cf89dbb83a1149f822ba69438c
Reviewed-by: Alexey Lyashkov <alexey_lyashkov@xyratex.com>
Reviewed-by: Bruce Korb <bruce_korb@xyratex.com>
Reviewed-on: http://review.whamcloud.com/1695
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>