Switch back the tox constraint to master

Tempest 39.0.0 release hash is prepared[1] so we can
revert back to use the master constraints by default.

[1] https://review.opendev.org/c/openstack/releases/+/918137

Change-Id: I29761a28dc4e1b097f660ff6beade8930dc45bed
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index b8ca03e..c652fe0 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -122,8 +122,6 @@
             voting: false
             irrelevant-files: *tempest-irrelevant-files
         - ironic-tempest-bios-ipmi-direct-tinyipa:
-            # TODO(gmann): this is made non voting temporarly
-            voting: false
             irrelevant-files: *tempest-irrelevant-files
         - openstack-tox-bashate:
             irrelevant-files: *tempest-irrelevant-files-2
@@ -156,8 +154,8 @@
         #    irrelevant-files: *tempest-irrelevant-files
         - nova-live-migration:
             irrelevant-files: *tempest-irrelevant-files
-        # - ironic-tempest-bios-ipmi-direct-tinyipa:
-        #     irrelevant-files: *tempest-irrelevant-files
+        - ironic-tempest-bios-ipmi-direct-tinyipa:
+            irrelevant-files: *tempest-irrelevant-files
     experimental:
       jobs:
         - nova-multi-cell