grep those gits aka drupal contribs

Following along the git migration and project cannot be grepped anymore I brewed the following code.

It assumes the gits are already cloned and placed is one common directory.

After running the script all repositories with a $major == 7 branch are set into the highest version.

I'm puzzling how to 'empty' the non $major compatible repos.

The fun part is now doing analysis on the tree