removed execute permissions

They are not needed on any file except the run-tests.sh

None of these files needed to have executable permissions on them. I am not sure if I just never noticed this or it was changed at some point.

Zero contents of any file were changed. I simply ran the following command against the repo to remove the exec permissions.

find . -type f -print0 | xargs -0 chmod -x

I then added exec permissions back to run-tests.sh