Docker CAT should not modify source code directory

#### Describe the bug
> _A clear and concise description of what the bug is._
Some times it is impossible for CNES Scan to write the `sonar-project.properties` or for Sonar Scanner to write the `.scannerwork`.

#### To reproduce
> _Steps to reproduce the behavior._
Launch an analysis with random access write permissions on source code.

#### Expected behavior
> _A clear and concise description of what you expected to happen._
Docker CAT should try not to write inside source code directory. Docker CAT would be more user-friendly.

#### User environment
> _Please complete the following information._
- OS: Linux
- Image version: 2.0.2