Enable Fuel stats sending to test collector

Add the possibility to send Fuel usage statistics to
some non-production collector service during system
tests on CI.

Change-Id: I4c1fd1923065ceecea76920cde2c9b7e87de7e34
Implements: blueprint fuel-stats-test
(cherry picked from commit 234cb75cd096fe60dcc19cc0d1c9d94335090de8)