The goal is to extract the common agent code from the linuxbridge agent
to share this code with other agents (e.g. sriov and new macvtap [1]).
This is a first step into the direction of a so called modular l2
agent.
Therefore all linuxbridge implementation specifics are moved into the
LinuxBridgeManager class. The manager class will be passed as argument
into the common agent loop instead of instantiating it in its
constructor. In addition the network_maps and the updated_devices map
has been moved into the rpc class.
A clear manager interface has been defined for the communication
between the common agent loop and the impl specific manager class.
In a follow up patchset, the common agent loop will be moved into a
new file. This has not yet happened to simplify tracking the code
changes during review.
[1] https://bugs.launchpad.net/neutron/+bug/1480979
Change-Id: Ia71f5a403b7029f8cc591f83df91ab2d3916f3f8
Partial-Bug: #1468803
Partial-Bug: #1480979
6e29cdd6b6