fixes #159 TimelyAnalytic error when analyticConfig.groupByColumn is None
fixes #159 TimelyAnalytic error when analyticConfig.groupByColumn is None

NationalSecurityAgency/timely,NationalSecurityAgency/timely,NationalSecurityAgency/timely,NationalSecurityAgency/timely,NationalSecurityAgency/timely,NationalSecurityAgency/timely,NationalSecurityAgency/timely