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))
"""
#487 Allow NFS mounts within the cinder-volumes container
Minor usability tweak to rpc_user_config - group lb entries
Add variable for galera wait_timeout

Related: #457
Add /var/cache/swift as a directory

* Servers require access to /var/cache/swift
* Directory will now exist and be owned by swift

Fixes #545
Add glance tests to gate script

Glance-swift (pubcloud) configuration was merged in
https://github.com/rcbops/jenkins-rpc/pull/69 so we can now test glance.

Related: https://github.com/rcbops/ansible-lxc-rpc/issues/472
Add 'devices' option to the replicator conf file

* Fixes issue where replicators are ignoring drives
* devices option needs to be present in both confs.

Fixes #548
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
Use identity_uri instead of auth fragments for swift-proxy

* Change proxy-server.conf to use identity_uri
* Remove auth fragment lines from the conf file

Fixes #554
Merge pull request #546 from andymcc/cache_fix

Add /var/cache/swift as a directory
Merge pull request #505 from BjoernT/issue487

Allow NFS mounts within the cinder-volumes container
Merge pull request #539 from hughsaunders/457

Add variable for galera wait_timeout
Merge pull request #549 from andymcc/repl_mount_check

Add 'devices' option to the replicator conf file
Ensure LOG_LOCAL settings are consistent for swift

* Ensure all logs for specific servers go to the appropriate places
* Adjust LOG_LOCAL settings to be consistent

Fixes #550
Merge pull request #551 from andymcc/swift_log_fix

Ensure LOG_LOCAL settings are consistent for swift
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
Merge pull request #555 from andymcc/identity_uri_swift

Use identity_uri instead of auth fragments for swift-proxy
Add contributor guidelines

This commit adds a CONTRIBUTING.md files that details the process for working with issues and pull-requests within this repo.  It also describes the process to use when reviewing others contributions