SEBA-753 adding voltha-1.7 to atests-job trigger

Change-Id: I2d4f813b0d35f66182ce20e75fabd02ec1e58d08
diff --git a/jjb/voltha-atest-provisioning.yaml b/jjb/voltha-atest-provisioning.yaml
index 73eacfd..ebce3ce 100644
--- a/jjb/voltha-atest-provisioning.yaml
+++ b/jjb/voltha-atest-provisioning.yaml
@@ -21,7 +21,7 @@
       - cord-infra-gerrit-trigger-patchset:
           gerrit-server-name: '{gerrit-server-name}'
           project-regexp: 'voltha'
-          branch-regexp: '{supported-branches-regexp}'
+          branch-regexp: '^(master|voltha-1.7)$'
           dependency-jobs: '{dependency-jobs}'
           file-include-regexp: '{all-files-regexp}'