NIFI-49: include name of default value if it is not allowed in a property descriptor
NIFI-49: Included patch from Philip Young to include name of default vlaue when not allowed as a property descriptor value
NIFI-49: Included patch from Philip Young to include name of default vlaue when not allowed as a property descriptor value
NIFI-49: Included patch from Philip Young to include name of default value when not allowed as a property descriptor value