Reduce code duplication in test_linux_dhcp

This patch reduces duplication in test_output_opts_file_*()

Change-Id: Ie68b26a48c1d0ed9cb8e584a7284c06688937cf9
Closes-Bug: #1352870
Refactor process_router method in L3 agent

Refactors the process_router method of the L3NATAgent class to several methods
that coherently group functionallity. The aim is to make the code more readable
and maintainable. There is no functional change in this patch.

Partially-Implements: bp restructure-l3-agent

Change-Id: Id35a5f10cd7d2dda565bffb14fc6a2fbd7eef3ea
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: I18f00383ecae68436a9208f094a898849bfed8a2
Merge "Refactor process_router method in L3 agent"
Merge "Reduce code duplication in test_linux_dhcp"
Merge "Imported Translations from Transifex"