New fuel-specs repo for Fuel designs and specs

Also add tracking of fuel-specs events via Gerrit IRC bot.
For this repo we use common fuel.config ACL file.

Closes-Bug: #1317024
Change-Id: Ib5a6295a82e97c5bb80c0e19f5757f3a12bb91bc
Merge "New fuel-specs repo for Fuel designs and specs"