Revert "LU-11771 ldlm: use hrtimer for recovery to fix timeout messages"

Revert "LU-11771 ldlm: use hrtimer for recovery to fix timeout messages"

This reverts commit 1ba794f6ec9e7ce7ad65fd74f170089fffc31d91.

We've seen several new or an increase in test failures for:
LU-12175 for sanity test 208 failures
LU-11560 for recovery-small test 134 failures
LU-12176 is for recovery-small test 107 failures
LU-12177 is for sanity test 160a failures

We are trying to pinpoint what patch landed that is causing these failures.

Test-Parameters: trivial testgroup=review-dne-part-1
Test-Parameters: testgroup=review-dne-zfs-part-1
Test-Parameters: testgroup=review-dne-part-1
Test-Parameters: testgroup=review-dne-zfs-part-1
Test-Parameters: testgroup=review-dne-part-1
Test-Parameters: testgroup=review-dne-zfs-part-1
Test-Parameters: testgroup=review-dne-part-1
Test-Parameters: testgroup=review-dne-zfs-part-1

Change-Id: I2ed33fb14726e29cae8745d671d4e25e276a7a66
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/34629
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>