Revert "Add dnsmasq_config_file flag for nova.conf and template for /etc/dnsmasq-nova.conf"

This reverts commit b5aca4f96a8a5e48255c2f002d52c93cc9ffb1c7.

this was accidentally merged in a different gate
Merge pull request #254 from mancdaz/master

revert b5aca4f96a8a5e48255c2f002d52c93cc9ffb1c7