Fixes to nova network after ubuntu testing

* Removes some services restarting that weren't ever installed
* Ensures python-novaclient is installed and an RC file is sourced
* Comments out deep dive into KVM as it's not necessary in install guide

Change-Id: I7a23720786ac9b1e9ac686e7c44c4d32599bdcd2
Merge "Fixes to nova network after ubuntu testing"