Add an attribute to InstanceGroup and AutoScalingGroup to return the ips

This is so you can make a custom loadbalancer that can reference the
group's instance ip's.

fixes bug #1131025
Change-Id: I32d76d3627704ad503e2ec06bf0da39cf79f33d2
heat : bump oslo-config version to fix import error

New oslo config patch causes services to fail to launch, with
"ImportError: No module named oslo.config", bumping to
oslo-config-2013.1b4.tar appears to fix the problem

fixes bug 1131135

Change-Id: I460564be19fc97bd54bb59c759c1148e7ead774b
Merge "heat : bump oslo-config version to fix import error"
Merge "Add an attribute to InstanceGroup and AutoScalingGroup to return the ips"
heat tests : fix run_tests.sh pep checks

run_tests.sh parses tox.ini, which has been changed removing the
pep8 version, so remove this test and specify the version in
test-requires.  This allows the pep tests to run via run_tests.sh
again, a subsequent patch can reinstate the version check based
on the test-requires version

fixes bug 1131251

Change-Id: Ib24f588cbe81ded768376c138d9d89f5bb311185