Add BlockStorage0Config Resource

Add a BlockStorage0Config resource in the block-storage.yaml template.
This was missing previously and was causing the behavior of having all
block storage nodes only being created after all other nodes were up in
a deployment (I presume b/c of the wait conditions).

Also, we need the BlockStorage0Config resource so that we can get the
configuration of neutron-openvswitch-agent from the metadata, previously
the values in the file were unset, causing the service to fail to start.

Change-Id: I297de24079d1ece66d35213b4ef1f2c8c50e73f0
Add enable_tunneling to swift storage metadata

Add the enable_tunneling option to the neutron-openvswitch-agent
metadata for the swift storage template. If not preset, this option is
left blank in the openvswitch plugin configuration plugin. This causes
the service to fail to start because a blank value is not permissible
for a boolean option.

Change-Id: Ieadcdab295913121bd00dbd25e4245024bc2240f
Expose dnsmasq options

Adds a new parameter, NeutronDnsmasqOptions, to the overcloud template.

Allows the ability to set dnsmasq options for neutron dhcp agent. This
will allow us to configure mtu to be 1400 for tenant instances on the
overcloud.  This should help with poor network performance and vm's that
are just plain unreachable via ssh due to the GRE tunnel overhead.

The default here has been set to:
dhcp-option-force=26,1400

This is the recommended way to configure OpenStack with the Open vSwitch
plugin per:
http://docs.openstack.org/admin-guide-cloud/content/openvswitch_plugin.html

All the documentation I can find on the web (openstack-dev,
ask.openstack.org, etc), recommend applying this setting. Others have
reported slow vm performance as well, and this resolves that issue
(apparently anyway...we'd need to test).

Change-Id: If24326045987b5a484ba2f71f591092987966536
Partial-Bug: #1270646

Conflicts:
	overcloud-source.yaml
Use 127.0.0.1 in mysql connection url

Substituted localhost with 127.0.0.1.

By default, systems with selinux enabled do not allow socket based
connections to mysql. Socket based connections are used when
localhost is in the mysql connection url.

Change-Id: Ic65dc9a58f2a8909b371ef5718b0693df9e6054e