Switch back the tox constraint to master

Tempest 42.0.0 release hash is prepared[1] so we can
revert back to use the master constraints by default.

[1] https://review.opendev.org/c/openstack/tempest/+/933772/1

Change-Id: I5267cc99d1ad6572fc8546d0338f25e7fad01481
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index d420c6a..a7641a6 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -119,9 +119,8 @@
         - tempest-full-test-account-py3:
             voting: false
             irrelevant-files: *tempest-irrelevant-files
-        # TODO(gmann): this is skipped temporarly
-        #- ironic-tempest-bios-ipmi-direct-tinyipa:
-        #    irrelevant-files: *tempest-irrelevant-files
+        - ironic-tempest-bios-ipmi-direct-tinyipa:
+            irrelevant-files: *tempest-irrelevant-files
         - openstack-tox-bashate:
             irrelevant-files: *tempest-irrelevant-files-2
     gate:
@@ -153,8 +152,8 @@
         #    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