This commit fixes#137. Some JUnit generators emit an empty failure tag,
with only a message property set. In those cases, the parser crashes
when trying to match the failure with a source file. Since this feature
is optional, the simplest fix is to skip the processing when the failure
tag is empty.
Also added a test, and the corresponding input file is generated from a
reporter within our codebase.
Previous implementation considered only test-cases with <failure> as failed. This fix makes processing of <error> and <failure> the same. It also handles situation when error or failure elements contains only text and no attributes.
Normally a <testsuites> element has a time field. In some JUnit implementations this field is missing. This issue was found in junit XML created in matlab.
At the moment I don't plan to explicitly support matlab - that would require to add more tests and documentation. However this patch should make it work with the existing java-junit parser.
