Source functions in rejoin-stack.sh

stackrc loads localrc and localrc can use functions
like enable_service and disable_service. Make sure
the functions are defined before loading stackrc.

Change-Id: Ied7bbe0d228f252902cc491b8db0738c5071f06b
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Don't install pep8 from packages

We have migrated to flake8 and most distros don't have the version of
pep8 that flake8 (and hacking) use.  Instead of installing pep8 from
packages it should be installed from pip

Change-Id: I86e4f8316f3cdc27303bfd039a78c0d6202ce321
Make dependency on libvirt dynamic

Fixes bug 1184960

Change-Id: If702807d9ae326bf216a2e076ce61062045d7c6b
Merge "Source functions in rejoin-stack.sh"
Merge "Don't install pep8 from packages"
Merge "Make dependency on libvirt dynamic"
Merge branch 'master' of github.com:openstack-dev/devstack