Simplify patching with fabric8 client v6 is released

[csviri]

Fabric8 client v6 will provide facilities to improve and simplify patching/editing the resource. Currently its quite cumbersome and inefficient (see serialization + load here):
https://github.com/java-operator-sdk/java-operator-sdk/blob/409cb1dca59a931f7ccb6edcc279aafa7a6f381e/operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/ReconciliationDispatcher.java#L363-L376