Add neutron(quantum) charm

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
remove file header in comment

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
reduce root-disk size to 2G

The role of the neutron(quantum) service is for networking only, no
need to have that much disk allocated.

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
Merge pull request #55 from battlemidget/feature-add-quantum

Add neutron(quantum) charm