Switch back the tox constraint to master

Tempest 37.0.0 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/+/908346

Change-Id: I6487792f9bd6aa6c6383ae6448038f6d77a5beb9
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index f69750d..210717a 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -123,8 +123,6 @@
             irrelevant-files: *tempest-irrelevant-files
         - ironic-tempest-bios-ipmi-direct-tinyipa:
             irrelevant-files: *tempest-irrelevant-files
-            # TODO(gmann): this is made non voting temporarly
-            voting: false
         - openstack-tox-bashate:
             irrelevant-files: *tempest-irrelevant-files-2
     gate:
@@ -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