Add support for reverting security context

Author: scholzj

cluster-controller/src/main/java/io/strimzi/controller/cluster/operator/resource/StatefulSetOperator.java

@@ -265,6 +265,7 @@ protected Future<ReconcileResult<P>> internalPatch(String namespace, String name
     protected StatefulSetDiff revertStorageChanges(StatefulSet current, StatefulSet desired) {
         desired.getSpec().setVolumeClaimTemplates(current.getSpec().getVolumeClaimTemplates());
         desired.getSpec().getTemplate().getSpec().setInitContainers(current.getSpec().getTemplate().getSpec().getInitContainers());
+        desired.getSpec().getTemplate().getSpec().setSecurityContext(current.getSpec().getTemplate().getSpec().getSecurityContext());
 
         if (current.getSpec().getVolumeClaimTemplates().isEmpty()) {
             // We are on ephemeral storage and changing to persistent