The attached patch fixes the policy module of regression test. However, I also think we may stop to rely permission set of pre-defined selinux domains. Instead of pre-defined one, sepgsql-regtest.te may be ought to define own domain with appropriate permission set independent from the base selinux-policy version.
I have applied this patch and ran the tests. All seems to work except that I have a minor error in the 'label' regression tests. It is simply a result order issue, modifying the expected order in my environment resolves the issue. I have attached the 'regression.diffs' for reference as well, FWIW, I have also attached a patch that corrects this issue for me, hopefully it is useful.