'This returns a set of orgs that are considered within a microsite. This can be used,
for example, to do filtering'

def get_all_orgs(self):

    org_filter_set = set()
    if (not self.has_configuration_set()):
        return org_filter_set
    for microsite in settings.MICROSITE_CONFIGURATION.itervalues():
        org_filter = microsite.get('course_org_filter')
        if org_filter:
            org_filter_set.add(org_filter)
    return org_filter_set
