scrutinizer: exclude what we can

hi,

php_loc and php_pdepend need excluded_dirs and not excluded_paths.
I also add php_analyzer, but can't test it in my repo (PHP Analyzer is currently only enabled for selected repositories ...)

I think we should introduce a vendor2 directory (vendor dir will be for composer)
and move ALL external code in this vendor2 dir

for the rating change of pydio, they recently change their algo