As a ONAP developer, I would like to move the @NotNull annotation from class level to field level, so that the parameter values can be expressed as simply null instead of "null".

The current class - https://github.com/onap/policy-distribution/blob/master/plugins/reception-plugins/src/main/java/org/onap/policy/distribution/reception/handling/sdc/SdcReceptionHandlerConfigurationParameterGroup.java