LU-8062 ptlrpc: increase sleep time in ptlrpc_request_bufs_pack()

LU-8062 ptlrpc: increase sleep time in ptlrpc_request_bufs_pack()

schedule_timeout() does not necessarily expire. Increase the sleeping
time in ptlrpc_request_bufs_pack() as 2 seconds is too short, given
the 1 second sleep used for recovery-small test_115_write().

Test-Parameters: envdefinitions=ONLY=115 testlist=recovery-small,recovery-small,recovery-small,recovery-small
Test-Parameters: envdefinitions=ONLY=115 testlist=recovery-small,recovery-small,recovery-small,recovery-small
Test-Parameters: envdefinitions=ONLY=115 testlist=recovery-small,recovery-small,recovery-small,recovery-small
Test-Parameters: envdefinitions=ONLY=115 testlist=recovery-small,recovery-small,recovery-small,recovery-small
Signed-off-by: Vitaly Fertman <vitaly.fertman@seagate.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: If1b6b147095e01663c0fa9a5b8f93c445d2061ee
Reviewed-on: https://review.whamcloud.com/26815
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>