Enabled VPNaaS as well as FWaaS

These commits add the configs needed to enable / install these
"advanced" services which are provided by Neutron.
fixed no_op notifier
fixed typo
Merge pull request #116 from cloudnull/vpnaas-fwaas

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updated Neutron L3 Agent setup

* Added guard to recipe "recipes/neutron-l3-agent.rb" which skips the bridge
create resource if the external_bridge attribute is nil or an empty string.
* Change the default attribute for external_bridge to an empty string as this
will provide for the most use cases without overriding the attribute.
Merge pull request #120 from cloudnull/l3-agent-ex-br

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Disable builtin router and network schedulers
Merge pull request #121 from Apsu/master

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added file to blank out rhel dist file in wrong place
updated neutron for better rhel support

When using a rhel or rhel based system, the package installation
of neutron, when installing via RDO, drops the file
"/usr/share/neutron/neutron-dist.conf" which adds unexpected variables
to the neutron configuration.  The pull requests makes the file
"/etc/neutron/neutron.conf" the one source of truth.

To accomodate some additional configuration which was in service in the
RHEL configuration file the following attributes were added.

```
default["neutron"]["database"]["max_overflow"] = 20
default["neutron"]["database"]["pool_timeout"] = 10
```

These attributes mirror the openstack defaults from upstream
neutron.conf example.
fixed issue in RHEL when rootwrap.d does not exist
Merge pull request #127 from cloudnull/Issue803

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Enable send_arp_for_ha in l3_agent.ini

send_arp_for_ha is defined for nova networks in the nova cookbook and
referenced here but never templated for quantum/neutron l3_agent.

- Add attribute for send_arp_for_ha_count in nova networks
- Add attribute for send_arp_for_ha in quantum/neutron
- Document new attributes in README
- Template send_arp_for_ha in l3_agent.ini

https://github.com/rcbops-cookbooks/nova will need to be updated
following this change.

See https://github.com/rcbops/chef-cookbooks/issues/877
Merge pull request #131 from claco/issue-877

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rpcdaemon: allow specification of enabled plugins

closes rcbops/chef-cookbooks/issues/944
Fix for Issue 941

Process is to stamp the DB and then make a revision note indicating this is an RCBOPS deployment which is then used to ensure that the DB is NOT stamped on subsequent chef runs.

This commit adds new node attr hash to the ["neutron"]["db"]["stamp"]

The DB stamp will only be attempted when the RCBOPS deployment $REVISION
is not found in the neutron db history.

This also fixes some syntax issues we had in addition to making the recipe more legible.

Issue:
rcbops/chef-cookbooks#941
Merge pull request #139 from claco/issue-941

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Merge pull request #135 from cbuben/issue-944

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