[webdav] litmus test LOCK is broken

[DeepDiver1975]

litmus test on latest git master shows LOCK being broken

36. indirect_refresh...... pass
37. unlock................ pass
38. unmapped_lock......... FAIL (LOCK on /oc/core/remote.php/webdav/litmus/lockcoll/ via /oc/core/remote.php/webdav/litmus/unmapped_url: 400 Bad request)
39. unlock................ SKIPPED
40. finish................ pass
-> 1 test was skipped.
<- summary for `locks': of 40 tests run: 39 passed, 1 failed. 97.5%
-> running `http':
 0. init.................. pass
 1. begin................. pass
 2. expect100............. pass
 3. finish................ pass
<- summary for `http': of 4 tests run: 4 passed, 0 failed. 100.0%

[DeepDiver1975]

it's related to the OC_Connector_Sabre_AbortedUploadDetectionPlugin

we should no run the detection on LOCK command