lisa.tests.base: Keep TraceEventCheckerBase in get_trace()
lisa.tests.base: Keep TraceEventCheckerBase in get_trace()

Pass the TraceEventCheckerBase as parameter to Trace(events=...) since
it is now handled.

credp/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa,credp/lisa