Temporary add feature pragma
Temporary add feature pragma

OpenStackSDK has a feature branch "feature/r1" as a preparation for the
R1.0 release. Due to different branch naming functional tests with
devstack are not running. Add temporarily (for the duration of the
feature branch) pragma to the zuul.yaml to allow Zuul run functional
tests. It will be dropped once SDK gets next major release.
Previous attemp didn't work well for other projects, therefore
explicitly include master as well.

Change-Id: I3a5722873f395bc52cc55a0fd6bcea0ebe3b74fc

openstack-dev/devstack,nawawi/openstack,openstack-dev/devstack,nawawi/openstack