Ensure that pip is installed before using it.

We need to ensure that pip is available before
trying to install xenapi with it.

Change-Id: I97ccbabe6e77205e516cc3b7e17bac8824a19520
Closes-Bug: #1183060
enable libvirt at boot

When using libvirt driver, we need to ensure that libvirt service is
actually enabled at boot.

Change-Id: Ie3198010ca8cfbe515d4e99e2662330f6ac29290
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge "Ensure that pip is installed before using it."
Merge git://github.com/puppetlabs/puppetlabs-nova