LU-4260 lod: free striping if striping initialization fails

It should free striping if striping information initialization is
faild, otherwise the later object find will pick up this wrong lod
object, and hit LBUG

ASSERTION( lc->ldo_stripenr == 0 ) failed:

[<ffffffffa0349895>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
[<ffffffffa0349e97>] lbug_with_loc+0x47/0xb0 [libcfs]
[<ffffffffa0e3f78f>] lod_ah_init+0x57f/0x5c0 [lod]
[<ffffffffa0b73a83>] mdd_object_make_hint+0x83/0xa0 [mdd]
[<ffffffffa0b7feb2>] mdd_create_data+0x332/0x7d0 [mdd]
[<ffffffffa0d9cc2c>] mdt_finish_open+0x125c/0x18a0 [mdt]
[<ffffffffa0d984f8>] ? mdt_object_open_lock+0x1c8/0x510 [mdt]
[<ffffffffa0d9ee8d>] mdt_reint_open+0x115d/0x20c0 [mdt]

Signed-off-by: wang di <di.wang@intel.com>
Change-Id: I4ce418cdf505e61d3be47350478ece531249d425
Patch-Set: 1
LLNL-bug: TOSS-2475