Conform 'Boostrapping Juju' info message

Closes: LP#1395124

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
Replace statusbar message of copying network scripts with a logger

Causes confusion on re-running openstack-status since the
statusbar indicates copying over the network configuration even
though a check occurs before making any network modifications.

Fixes #246

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>