Move the exim role to be a "generic" role in the top-level roles/
directory, making it available for use as a Zuul role.
Update the linters jobs to look for roles in the top level
Update the Role documentation to explain what the split in roles is
about.
Change-Id: I6b49d2a4b120141b3c99f5f1e28c410da12d9dc3
Since we're building out roles in system-config now, generate
documentation. We look in roles/* and playbook/roles/* (follow-on
changes will split things up between the two).
Correct the reference names in the exim documentation to avoid
warnings and failure.
This also revealed a single unicode character in the exim readme
(which caused prior versions of zuul-sphinx to barf). For fun, see if
you can find it!
Depends-On: https://review.openstack.org/#/c/579474/
Change-Id: I243a96bbd6d09560f8aa80b6345b90039422547a
Ian Wienand