Remove second odt files for CV and use gem method

[lkleisa]

In story #482, we included skills with a specific level of person level in the CV. For that, we added a new table in new odt files with a new table "LEVEL_COMPETENCES". So we have 8 odt files for 4 cases. Maybe there is an option, that we can remove the table with the code (similar to report.addTable().
Doc: https://github.com/sandrods/odf-report

[Robin481]

TODO:

• Evaluate alternative options
• Read through the gem and check whether it would be feasible to build some kind of method on top of it?
• Completely different ideas?