Gitlab formatter: unusable file path for composer.json

[bobvandevijver]

When using the Gitlab formatter, the full path to the composer.json file is used, which is reported to the interface.

When clicking the link, you will get a notification that the file does not exist in the repository:

This might also be an issue with the Github formatter, which is the only other formatter to use the $composerJsonPath param.

I believe this path should be relative to the execution dir. What do you think?

[bobvandevijver]

It looks like this actually also causes the reported finding to be incorrect, as that seems to compare the full item including the full path.