Revert "LU-11760 ofd: formatted OST recognition change"

Revert "LU-11760 ofd: formatted OST recognition change"

This is causing conf-sanity test_69 failures in LU-12404 due to
the increased limit on the number of objects precreated after
recovery.  The issue will be fixed in a different way.

This reverts commit d07d9c5ed0aa1d6614944c7d1e0ca55cba301dc4.

Change-Id: I437889f20699207fa15eff6685b0992292555f19
Reviewed-on: https://review.whamcloud.com/35388
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Sergey Cheremencev <c17829@cray.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>