TeamCity reporter, trimmed stack trace

Looks like here:
https://github.com/utPLSQL/utPLSQL/blob/e40966493a52979715697914f94dee1c9edf8e85/source/reporters/ut_teamcity_reporter.tpb#L77
https://github.com/utPLSQL/utPLSQL/blob/e40966493a52979715697914f94dee1c9edf8e85/source/reporters/ut_teamcity_reporter.tpb#L95
`.error_backtrace` should be replaced with `.get_error_stack_trace()`
In that case actual error message will be reported;