LU-9019 target: migrate to 64 bit time

LU-9019 target: migrate to 64 bit time

Replace cfs_time_current_sec() to avoid the overflow
issues in 2038 with ktime_get_real_seconds(). Change
time_t bi_deadline to time64_t. Do a direction compare
instead of cfs_time_beforeeq() wrapper.

Change-Id: I93d1cab9ebdcc1f910096e8a229d6c37b244f41d
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/27909
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>