qa: Add workunit that hangs for manual thrasher testing

Signed-off-by: David Zafman <david.zafman@inktank.com>
test: Fix valgrind found "Mismatched free() / delete / delete []"

Use delete[] in set_argv() so that valgrind runs clean

Signed-off-by: David Zafman <david.zafman@inktank.com>
osdc: Add asserts that client_lock is held

Clarify locking by indicating that client_lock is held

Signed-off-by: David Zafman <david.zafman@inktank.com>
osdc: op left in check_lastest_map_ops

Call op_cancel_map_check before cancel_op() in send_linger()

Fixes: #5784

Signed-off-by: David Zafman <david.zafman@inktank.com>
Verify that deleting op never in check_latest_map_ops map

Signed-off-by: David Zafman <david.zafman@inktank.com>
Merge branch 'wip-5784' into next

Reviewed-by: Samuel Just <sam.just@inktank.com>