[JENKINS-15863][JENKINS-13936] Write HTML content in file when XML is
parsed.
HTML contents of the result was saved in memory before to be written in
files. To avoid OOM, I write the file when the XML si parsed.
Move temporary files to target
format
Improve logs
Remove existing exception on tests
Remove html extension (need to change more code)
improve log
Merge pull request #16 from antoine-aumjaud/features/FITNESSE-PLUGIN-StoreHtmlContentInFileWhenXMLIsParsed

Store HTML content in file during the XML parsing to avoid OOM