Add missing Ubuntu packages

When running scripts/bootstrap-aio.sh with options set to
export BOOTSTRAP_OPTS="bootstrap_host_data_disk_device=sdb"
parted is required to cope with disk wiping and proper
partitioning. iptables are required later while configuring
vlans and bridges.

Change-Id: I2221fc63c3779358dec5edf9e2d110bc2e1528c1

tests/roles/bootstrap-host/vars/ubuntu.yml

@@ -22,9 +22,12 @@ packages_install:
   - dbus
   - ethtool
   - git-core
+  - iptables
+  - iputils-tracepath
   - ipython
   - linux-image-extra-{{ ansible_kernel }}
   - lvm2
+  - parted
   - python2.7
   - python-dev
   - sshpass
@@ -32,7 +35,6 @@ packages_install:
   - vim
   - vlan
   - xfsprogs
-  - iputils-tracepath
 
 packages_remove:
   - libmysqlclient18