add logging for dnsmasq messages

By default dnsmasq logs to DAMEON which normally hits /var/log/syslog or /var/log/messages
This isn't the case with the containers.

I added an override to log to /var/log/neutron/neutron-dnsmasq.log \
			aka /openstack/log/*neutron_agents*/neutron-dnsmasq.log

This should automatically get pulled in and logstash'd when the play is rerun based on the code below.
Someone please confirm that no additional steps are needed to pull in this extra log.

https://github.com/rcbops/ansible-lxc-rpc/blob/master/rpc_deployment/roles/rsyslog_config/templates/genlog.py#L26-28

"""
for root, dirnames, filenames in os.walk('/openstack/log'):
        for filename in fnmatch.filter(filenames, '*.log'):
                matches.append(os.path.join(root, filename))
"""
Minor usability tweak to rpc_user_config - group lb entries
Adjust /var/log/swift creation for proxy-server

* log dir needs to be owned by syslog instead of swift
* Remove from group_vars
* Dir is created by the log_setup task in the swift_common role

Fixes #552
Merge pull request #553 from andymcc/proxy_log

Adjust /var/log/swift creation for proxy-server
Merge pull request #502 from SamYaple/dnsmasq-logging

add logging for dnsmasq messages
Merge pull request #526 from odyssey4me/minor-user-config-usability-fix

Minor usability tweak to rpc_user_config - group lb entries