Add python-netaddr to jenkins::slave package list
Add python-netaddr to jenkins::slave package list

Devstack functions:address_in_net() runs embedded python that imports
netaddr. This function fails when python-netaddr is not installed.
Install it as part of the bare package list in order to have devstack
run properly.

Change-Id: I1970a2040445548756101d839263bd4a007e0dd2
Reviewed-on: https://review.openstack.org/13600
Reviewed-by: Joe Heck <be1bd371cc749ae5686d4c156026d6a402a6ac69@mac.com>
Reviewed-by: Paul Belanger <b4265d8fef626f73eff739ef4ffce9d45b30eddd@polybeacon.com>
Approved: James E. Blair <e81a02a9d6405977f63a769d9f6ec8ed9d924325@inaugust.com>
Reviewed-by: James E. Blair <e81a02a9d6405977f63a769d9f6ec8ed9d924325@inaugust.com>
Tested-by: Jenkins

open-switch/infra_puppet-jenkins,open-switch/infra_puppet-jenkins