Use our patched version of xunitmerge

The patched version of xunitmerge prioritizes non-skipped results
over skipped if there is a collision of test case's results with
the same name. The original version of xunitmerge doesn't use
test case's results and doesn't track collisions at all.

Correct merging requires that non-skipped results will not be
duplicated over input files.

Change-Id: I1db3daab7c37577e3be6bf694c1a58227f074928
Related-PROD: PROD-20207
1 file changed