xenapi: Add qemu-utils as a cinder dependency

If you are using xenapi, your system won't have qemu-img installed. This
patch adds the package qemu-utils to the list of cinder
apts/rpms/suse-rpms, thus devstack will pull the required binaries.

Change-Id: Id701880ce03bb3e78223df0af6a00b052408407c
Fix python exec prefix on SUSE.

https://bugs.launchpad.net/devstack/+bug/1068386
"sudo python setup.py develop" installs to /usr/bin on SUSE

Otherwise it fails with "stack.sh:191 g-api did not start".

Change-Id: I1258240ce2a5a765188353fbc8a2e085d0b02fec
Enhance DevStack to allow user to specify the
following customizations for the predefined networks
created on startup (default in parenthesis):

PRIVATE_SUBNET_NAME    - Name of the local subnet (private-subnet)
PUBLIC_SUBNET_NAME     - Name of the public subnet (public-subnet)
PUBLIC_NETWORK_GATEWAY - IP for the public subnet (172.24.4.225)

Moved NETWORK_GATEWAY into lib/quantum, along with these new
customizations.

bug 1194218

Change-Id: I87ebc22e338df278db7523f11be07de1ca88234b
Merge "Fix python exec prefix on SUSE."
Merge "xenapi: Add qemu-utils as a cinder dependency"