tool update: check_update.sh - can now use github oauth and check roles
tool update: check_update.sh - can now use github oauth and check roles

 - export GITHUB_TOKEN variable
 - checking roles might only work for members of the CSC github org
  - it checks if the version in requirements.yml is different
    than the latest one on github.

mantti/fgci-tut,CSC-IT-Center-for-Science/fgci-ansible,mantti/fgci-tut,mantti/fgci-tut