Add support for Erlang/OTP Junit format

The Common Test framework in Erlang/OTP can create Jenkins/Hudson
compatible Junit reports since R15B. In xunit 1.54 these files are
correctly consumed and rendered by the xUnit plugin.

However in more recent versions the files are not parsed correctly due
to some extra attributes. This adds support for these attributes. The
standard Jenkins Junit plugin consumes these files correctly.
Remove unused files
Fix JENKINS-18098
[maven-release-plugin] prepare release xunit-1.76
[maven-release-plugin] prepare for next development iteration
Merge pull request #13 from mindjiver/make-xunit-enable-to-read-erlang-surefire-format

Add support for Erlang/OTP Junit format
Fix for JENKINS-21195
Merge pull request #14 from pruiz/JENKINS-21195

Simple fix for JENKINS-21195
[maven-release-plugin] prepare release xunit-1.77
[maven-release-plugin] prepare for next development iteration
JENKINS-21220 - Make XUnitProcessor serializable

When processing xUnit files on remote SSH slaves the following error
was obserserved:

 The plugin hasn't been performed correctly: remote file operation failed: /home/jenkins/workspace/xunit at hudson.remoting.Channel@56f87a20:slave

When investigating it was found that a NotSerializableException was
thrown. Simply make the needed classes serializable.
Merge pull request #16 from mindjiver/make-xunit-processor-serializable

JENKINS-21220 - Make XUnitProcessor serializable