Allow DHCPv6 reply from server to client

Add security group rule to allow DHCPv6 reply from dhcp server
link local addres port 547 to client port 546.

Change-Id: I5fd9561e855b1d3999649934977af659d5ca221f
Closes-Bug: 1335984
Fail on None before iteration attempt

Check for a 'None' value before trying to iterate over it
in the bulk code. Also eliminates an unneccessary anonymous
recursive function in the same bulk handling code.

Closes-Bug: #1368055
Change-Id: Id4aca81e4882a3cdf9c790bdea0b0b515abc9a8c
Remove @author(s) from copyright statements

We have git to track authorship, so let's not pad source files
with it as well.

A hacking check has been added for this. The value is N322.

Change-Id: Iab0b64d417e0bb41a6b455e2ac377deee64ec3ee
Fix DVR to service DHCP Ports

This fix ensures that DHCP Ports that are
available on DVR routed subnets, are serviced
by DVR neutron infrastructure.

Here servicing by DVR means, creation of
DVR namespaces on such nodes holding DHCP
Ports and also applying DVR specific OVS
Rules to the br-int and br-tun bridges on
such nodes, to enable traffic to be routed
via DVR to such DHCP Ports.

Closes-Bug: #1358718

Change-Id: Ib6d5fbf883d6698f34f3a3b722e426e3285a5736
Merge "Allow DHCPv6 reply from server to client"
Merge "Fail on None before iteration attempt"
Merge "Fix DVR to service DHCP Ports"
Merge "Remove @author(s) from copyright statements"
Merge branch 'master' of https://github.com/openstack/quantum