provide event stream API

completed codegen manually
provide update and compare code for fes
add db check for specified databases and tables
add unit test

manifests/operator-service-account-rbac.yaml

@@ -35,6 +35,20 @@ rules:
   - get
   - list
   - watch
+# all verbs allowed for event streams
+- apiGroups:
+  - zalando.org
+  resources:
+  - fabriceventstream
+  verbs:
+  - create
+  - delete
+  - deletecollection
+  - get
+  - list
+  - patch
+  - update
+  - watch
 # to create or get/update CRDs when starting up
 - apiGroups:
   - apiextensions.k8s.io