Revert "MRP-1746 mgc: mgc import reconnect race"

This reverts commit 0d62e6f21e03a9e369e9810d23511d7e84c723e7.
LU-3071 obdfilter: call cfs_cap_raise() before journal start

cfs_cap_raise() may allocate memory and result in page flush on
different fs, which could probably try to start a nested
transaction on different journal.

This patch moves cfs_cap_raise() before journal start.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Change-Id: I6583e134c34bc437f1aa05ca9ec922c2d5441d27