Merge pull request containers#2924 from containers/gating_test_SAN_fix

Workaround for RHEL gating test failure

tests/authenticate.bats

@@ -33,7 +33,12 @@ load helpers
   expect_output --substring "Writing manifest to image destination"
 
   # With tls-verify=true, should fail due to self-signed cert
-  run_buildah 125 push  --signature-policy ${TESTSDIR}/policy.json --tls-verify=true alpine localhost:5000/my-alpine
+  # The magic GODEBUG is needed for RHEL on 2021-01-20. Without it,
+  # we get the following error instead of 'unknown authority':
+  #   x509: certificate relies on legacy Common Name field, use SANs or [...]
+  # It is possible that this is a temporary workaround, and Go
+  # may remove it without notice. We'll deal with that then.
+  GODEBUG=x509ignoreCN=0 run_buildah 125 push  --signature-policy ${TESTSDIR}/policy.json --tls-verify=true alpine localhost:5000/my-alpine
   expect_output --substring " x509: certificate signed by unknown authority" \
                 "push with --tls-verify=true"