Delete log translation functions and add hacking rule
The i18n team has decided not to translate the logs because it seems
like it not very useful; operators prefer to have them in English so
that they can search for those strings on the internet.
Since we have removed log translations completely, we should add hacking
rule to prevent future mistakes.
This code introduces standalone service which proxies its calls to
existing nova EC2-API.
All the code here except for the ec2api/api/proxy.py,
ec2api/api/ec2client.py and some util functions is taken from current
nova and unused functionality is cut of it.
The proxy.py and ec2client.py files implement the new code which
proxies incoming request (on port 8788) to original EC2 API in nova
on port 8773.
The result is transparently translated back to user.