Don't run some more complex CI jobs on unrelated changes
Don't run some more complex CI jobs on unrelated changes

We don't need to run e.g. functional, fullstack and all scenario jobs
on patches which are changing e.g. only documentation or release notes
or other things like that.

This patch also removes test-requirements.txt and requirements.txt files
from that list of unrelated files as we want to run our ci jobs when
requirements are changed.

Change-Id: I7950de04c497b14d9225abe6584b7bb7d056f79c

mahak/neutron,openstack/neutron,openstack/neutron,mahak/neutron,openstack/neutron,mahak/neutron