'Check if tags dictionary contains string:string pairs.
:param tags: dictionary of string:string pairs
:return: None'

def validate_tags(self, tags):

    if (not self.facts_module):
        if (not isinstance(tags, dict)):
            self.fail('Tags    must    be    a    dictionary    of    string:string    values.')
        for (key, value) in tags.items():
            if (not isinstance(value, str)):
                self.fail('Tags    values    must    be    strings.    Found    {0}:{1}'.format(str(key), str(value)))
