kola/tests: move OCP tests to RequiredTag

Now that the layered CoreOS work has landed, the variants built by cosa
no longer have OCP components. So let's default to not running OpenShift
tests at the kola level by changing them to use `RequiredTag`.

This will allow us to drop the `--tag !openshift` in various places.
Running OpenShift tests will require passing `--tag openshift`.

Author: jlebon

mantle/kola/tests/crio/crio.go

@@ -195,7 +195,8 @@ func init() {
 		Distros:     []string{"rhcos"},
 		UserData:    enableCrioIgn,
 		// crio pods require fetching a kubernetes pause image
-		Tags: []string{"crio", kola.NeedsInternetTag, "openshift"},
+		Tags:        []string{"crio", kola.NeedsInternetTag},
+		RequiredTag: "openshift",
 	})
 	register.RegisterTest(&register.Test{
 		Run:         crioNetwork,
@@ -205,7 +206,8 @@ func init() {
 		Distros:     []string{"rhcos"},
 		UserData:    enableCrioIgn,
 		// this test requires net connections outside the host
-		Tags: []string{"crio", kola.NeedsInternetTag, "openshift"},
+		Tags:        []string{"crio", kola.NeedsInternetTag},
+		RequiredTag: "openshift",
 		// qemu machines cannot communicate between each other
 		ExcludePlatforms: []string{"qemu"},
 	})

mantle/kola/tests/misc/network.go

@@ -69,7 +69,7 @@ func init() {
 		Timeout:        40 * time.Minute,
 		Distros:        []string{"rhcos"},
 		Platforms:      []string{"qemu"},
-		Tags:           []string{"openshift"},
+		RequiredTag:    "openshift",
 		AdditionalNics: 2,
 		UserData:       userdata,
 	})