This patch adds a doc8 check of .rst files to the current pep8 check.
It includes fixes to the .rst files that didn't pass the check.
Change-Id: Ib7a63d1e579f77039172aa4f99d26a3ceeef83d7
1) Update doc links according to OpenStack document migration
2) Use https instead of http for docs links
Change-Id: I5644f38cf56f1e3b6a31252523a3bf28248e9f08