Improve UT pass rate

[whitneywhtsang]

This is the last PR to improve UT pass rate for PVC rolling driver.
There are 21 remaining failures, which are tracked in #2755 and #2968.

Before:

debug: passed: 28, failed: 0, skipped: 20, xfailed: 0, total: 48, fixme: 0, pass rate (w/o xfailed): 58.33%
interpreter: passed: 6364, failed: 0, skipped: 1, xfailed: 697, total: 7062, fixme: 0, pass rate (w/o xfailed): 99.98%
all: passed: 18671, failed: 0, skipped: 23, xfailed: 1309, total: 20003, fixme: 48, pass rate (w/o xfailed): 99.88%

After:

debug: passed: 28, failed: 0, skipped: 19, xfailed: 0, total: 47, fixme: 0, pass rate (w/o xfailed): 59.57%
interpreter: passed: 6365, failed: 0, skipped: 0, xfailed: 697, total: 7062, fixme: 0, pass rate (w/o xfailed): 100.0%
all: passed: 18672, failed: 0, skipped: 21, xfailed: 1309, total: 20002, fixme: 48, pass rate (w/o xfailed): 99.89%

[whitneywhtsang]

If not commented out, it would be counted as one skipped UT.