set wrap_width for config generator to 80
set wrap_width for config generator to 80

pep8 is testing for 80 character lines. By force wrapping at 79 we get
weird edge conditions in our detailed help blocks of very odd wraps
with 80 character lines.

pep8 and conf generator should agree on this value.

Change-Id: I003964dfc46673bed3717862043d76bfb59ce217
Closes-Bug: #1587821

rahulunair/nova,rahulunair/nova,Juniper/nova,vmturbo/nova,hanlind/nova,sebrandon1/nova,Juniper/nova,sebrandon1/nova,gooddata/openstack-nova,rajalokan/nova,hanlind/nova,vmturbo/nova,jianghuaw/nova,vmturbo/nova,gooddata/openstack-nova,gooddata/openstack-nova,mikalstill/nova,sebrandon1/nova,openstack/nova,mahak/nova,Juniper/nova,klmitch/nova,jianghuaw/nova,klmitch/nova,rajalokan/nova,vmturbo/nova,klmitch/nova,klmitch/nova,rahulunair/nova,alaski/nova,rajalokan/nova,openstack/nova,phenoxim/nova,jianghuaw/nova,mikalstill/nova,phenoxim/nova,rajalokan/nova,gooddata/openstack-nova,hanlind/nova,cloudbase/nova,mahak/nova,alaski/nova,cloudbase/nova,Juniper/nova,openstack/nova,cloudbase/nova,mahak/nova,jianghuaw/nova,mikalstill/nova