Having multiple benchmarks for a single name is something specific to
the gotest output, so grouping benchmarks by name is not something that
belongs in the junit package.
The consequence of this is that any output emitted after the test or
benchmark result, will no longer belong to the last test. Instead it
will be appended to the global log. This is necessary to correctly
attribute output to the correct test or benchmark, for example in cases
where both tests and benchmarks appear.
In the past, Go test output printed test logs after the test result.
However, from Go 1.14 this behaviour was changed and test logs are now
printed before the test result.
With this commit, we effectively no longer support the old behaviour in
Go1.13 and earlier. The output will still appear in the generated
report, however it will no longer belong to the correct test.
