Add replace for github.com/rabbitmq/cluster-operator/v2

Signed-off-by: Martin Schuppert <mschuppert@redhat.com>

Author: stuggi

api/go.mod

@@ -77,3 +77,6 @@ require (
 // mschuppert: map to latest commit from release-4.13 tag
 // must consistent within modules and service operators
 replace github.com/openshift/api => github.com/openshift/api v0.0.0-20240830023148-b7d0481c9094 //allow-merging
+
+// custom RabbitmqClusterSpecCore for OpenStackControlplane (v2.6.0_patches_tag)
+replace github.com/rabbitmq/cluster-operator/v2 => github.com/openstack-k8s-operators/rabbitmq-cluster-operator/v2 v2.6.1-0.20241017142550-a3524acedd49 //allow-merging