@Override
    public int hashCode() {
        final int prime = 31;
        int result = super.hashCode();
        result = prime * result + ((componentClass == null) ? 0 : componentClass.hashCode());
        return result;
    }
@author Tony Vaagenes
@author gjoranv
@author ollivir
container-core/src/main/java/com/yahoo/container/di/componentgraph/core/ComponentRegistryNode.java