Bump up the sqlalchemy version for py26

The redhat repo for RDO and epel itself has access to 0.8 so
it would be great if we also tested those same versions since
those versions are common on that distribution (the main one
that still runs py26).

Change-Id: I25fe6a345bf417fc6957f075ac01f361bcd36982
Reduce the worker-engine joint testing time

This adjustment tweaks how workers and an engine use
there configuration (making it so they share the majority
of configuration). This also allows both engine and worker
to share the same configuration, which allows them to share
the same polling interval and so-on.

This has the effect of reducing the test time on a local
machine that I am running them on (one of many that I run
them on).

Before: Ran 1022 tests in ~130s (same machine)

After: Ran 1022 tests in ~60s (same machine)

Change-Id: I2150d26fb52cb86d61682124d710ba15c7ff27a6
Merge "Bump up the sqlalchemy version for py26"
Merge "Reduce the worker-engine joint testing time"
Updated from global requirements

Change-Id: I027659520dad2166b8e28ec0a2334cd58c563dfc