sync parameter values with keystone-dist.conf

and adjust descriptions to take dist.conf defaults into account (rhbz#923912)
Use updated parallel install versions of epel package

Use SQLAlchemy >= 0.7.8 WebOb >= 1.2 Routes >= 1.12.3 PasteDeploy >= 1.5.0
and depend on the parallel installable
versions of these packages to satisfy those requirements.
sphinx10 in el6 does not have apidoc extension

rpm build was failing with:
Running Sphinx v1.0.8
sh: git: command not found
Extension error:
Could not import extension ext.apidoc (exception: cannot import name apidoc)
refactor service readiness notification

drop old keystone.common.systemd
drop onready configuration parameter
import and apply new oslo systemd module