'Method to return the date for a log line.
Parameters
line : str
Log line, of which the date should be extracted from.
default_tz: ignored, Unix timestamps are time zone independent
Returns
(float, str)
Tuple containing a Unix timestamp, and the string of the date
which was matched and in turned used to calculated the timestamp.'

def getDate(self, line, dateMatch=None, default_tz=None):

    if (not dateMatch):
        dateMatch = self.matchDate(line)
    if dateMatch:
        return (float(dateMatch.group(1)), dateMatch)
