First cut at using distro packages.
Need to save the haproxy version for the configuration.
Forgot -y to install non-interactively.
Remove old purging of haproxy pacakge.
Using nginx and protobuf packages.
Removed maven, cmake and used control for deps.

Use control to list dependencies instead of installing a package at a
time.
Cleanup of unused lines.
Fixed typo in pkg list, removed setting of hosts.
Removed double check, and swap dependencies order.
Remove reference to locally installed monit.
Remove reference to locally installed packages.

There still were some configuration for monit and nginx, referring to the
locally installed version.
Merge branch 'master' into use-packages

Conflicts:
	debian/appscale_install_functions.sh
Use python-pika from package.
Prevent to run install without an argument
Remove protobuf dependency (AppServer uses its own)
Cleanup empty functions.
Removed spurious :;
Conflict with python-protobuf.
Make sure monit is restarted.

Upon install of the new config, let's make sure monit is restarted.
Removed pull of custom haproxy tarball since it's not used anymore.
Update changelog, and print also the distributor.