[CDN-1176] Add fix to delete SNI certificate with domain name

[merryldmello]

CDN-1176
poppy/distributed_task/taskflow/task/delete_ssl_certificate_tasks.py
Removed flavor_id as cert_obj_json will contain all cert information.

poppy/provider/akamai/certificates.py b/poppy/provider/akamai/certificates.py
If domain is not found on certificate, we need to check pending change in progress and skip it if found; moved changes to appropriate part of the code.

poppy/transport/pecan/controllers/v1/ssl_certificates.py
Deletion of domain was hardcoded to san, and now has been accommodated for any type of cert value by accepting the request body instead.

tests/unit/distributed_task/taskflow/test_flows.py b/tests/unit/distributed_task/taskflow/test_flows.py
Changed variables respective to changes in code.

tests/unit/provider/akamai/test_certificates.py b/tests/unit/provider/akamai/test_certificates.py
Deleted a duplicate test.
Added cert details to pending changes, as it contains change url.

[satroutr]

Commit message is not pep8 compliance

[satroutr]

Please add a comment what we are doing here. example(check if there is no pending changes in the enrolment

[satroutr]

we removed the testcase for test_cert_delete_domain_exists_on_sni_certs
dont we need them anymore

[satroutr]

existing implementation looks good. is it possible to use the existing implementation?

[LukeRepko]

Should be:

        def delete(self, domain_name):
        certificate_controller = \
            self._driver.manager.ssl_certificate_controller

        try:
            # NOTE(TheSriram): we can also enforce project_id constraints
            cert_obj = certificate_controller.get_certs_info_by_domain(
                domain_name=domain_name,
                project_id=None)
        except ValueError:
            pecan.abort(404, detail='certificate '
                                    'could not be found '
                                    'for domain : %s' %
                        domain_name)
            raise

        try:
            certificate_controller.delete_ssl_certificate(
                cert_obj.project_id, domain_name, cert_obj.cert_type
            )
        except ValueError as e:
            pecan.abort(400, detail='Delete ssl certificate failed. '
                        'Reason: %s' % str(e))

        return pecan.Response(None, 202)

    @pecan.expose('json')
    @decorators.validate(
        domain_name=rule.Rule(
            helpers.is_valid_domain_by_name(),
            helpers.abort_with_message)
    )