Note:
These are the same repro steps from JENKINS-32746 but for Xunit.

When some of builds were deleted from BuildHistory, Xunit Results Trend graph does not show all preceding builds anymore.

Steps to reproduce:
1. Make several builds (#1, #2, #3) with test results.
2. Make one more build (#4). Delete it manually from build History
3. Make few more builds (#5, #6) and see to graph.
*Expected result: *graph contains build #1, #2, #3, #5, #6 (all but deleted)

• Actual result: *graph contains only results after deleted one: #5, #6