LU-2268 o2iblnd: initialize tx-pool after fmr-pool

LU-2268 o2iblnd: initialize tx-pool after fmr-pool

TX pool should be created after FMR pool, otherwise
kiblnd_create_tx_pool() will not allocate tx_pages for
kib_tx_t even if FMR is enabled.

Signed-off-by: Liang Zhen <liang@whamcloud.com>
Change-Id: I30d3c53b4e29ac249500cf1f780619dcfaa59b10
Reviewed-on: http://review.whamcloud.com/4670
Tested-by: Hudson
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>