'Fixup:
- time fields as struct_time
- config dict
- protect externalId'

def _fixup(self):

    super(ControlFlowAction, self)._fixup()
    if self.startTime:
        self.startTime = parse_timestamp(self.startTime)
    if self.endTime:
        self.endTime = parse_timestamp(self.endTime)
    if self.retries:
        self.retries = int(self.retries)
    if (self.externalId and (not re.match('job_.*', self.externalId))):
        self.externalId = None
    self.conf_dict = {}
