Use updated parallel install versions of epel package

Use sqlalchemy >= 0.6.3 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.

Delve into pkg_resources a little to get it to modify sys.path,
so that our parallel installed egg takes precedence over the
system default module versions.

Conflicts:
	cinder/db/sqlalchemy/migration.py
Revert "Use oslo.sphinx and remove local copy of doc theme"

This reverts commit 8b1ae18ba95f04fedc04592b419401d75d448543.

Conflicts:

	test-requirements.txt