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.

Change-Id: I671b589150fe731125e16316a994a5942219920b
diff --git a/.zuul.yaml b/.zuul.yaml
index 00129b5..9a675c6 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,3 +1,10 @@
+- pragma:
+   # NOTE(gtema): this is required for the changes in SDK feature/r1 branch to
+   # be using devstack
+   # TODO(gtema): delete this once r1 branch is merged into master
+    implied-branches:
+      - feature/r1
+
 - nodeset:
     name: openstack-single-node
     nodes: