move doc8 test to pep8 job
move doc8 test to pep8 job

Run the doc8 style checks with the pep8 job instead of the unit test job.

Change-Id: I094ccae8b76a1268b288812bd478797cfb9d0f4d
Signed-off-by: Doug Hellmann <0798ebecfb7bc4dfb9d0445c2fa030eb64e1fa1c@doughellmann.com>

openstack/oslo.service