Add FOSSology to ci-license-scan

To improve license scan process we add license scan using a FOSSology server.

The fossology.py adds an ApertisFossolgy class which is able to:

• request upload of source code from Git server to FOSSology server,
• retrieve references of previous scan for this source code,
• request scan of the source code,
• download analysis report.
• remove FOSSology header, project's name in file path and sort files

This class is used in ci-licence-scan to generate the debian/apertis/copyright.fossology file.

Signed-off-by: Frédéric Danis frederic.danis@collabora.com