[JENKINS-21467] Unable to copy the sloccount summary when the job has been executed on a slave with a different OS

- Previous code change that tries to evaluate the path on master machine removed.
- The code now evaluates the path on slave which is much more robust. The master receives only two strings with file name and absolute path relative to slave machine.
[JENKINS-21500] Link to workspace root directory is not accessible in results

- The link to the workspace root is not displayed because the text of the link is an empty string.
- All links to directories were extended by trailing slash '/' character.
Merge pull request #28 from mixalturek/master

Bugfixes