LU-1753 test: use large resend count for 118i in sanity

LU-1753 test: use large resend count for 118i in sanity

in sanity.sh, the subtest 118i will fail if the resend count
of OSC is small for 'SLOW=no' case (it's 4, default is 10).

Signed-off-by: Hongchao Zhang <hongchao.zhang@whamcloud.com>
Change-Id: I3c49628ed259e7adbff4a100d482e693502bf99d
Reviewed-on: http://review.whamcloud.com/4071
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>