Support new event types

[caddac]

There are some new event types which we should handle. Full list is here: https://cloud.google.com/marketplace/docs/partners/integrated-saas/backend-integration#eventtypes

Need to add the types to here:

doit-easily-marketplace/api/Entitlement.py

Lines 119 to 174 in 660a27b

	if event_type == "ENTITLEMENT_CREATION_REQUESTED":
	if entitlement_state == "ENTITLEMENT_ACTIVATION_REQUESTED":
	if product_settings.auto_approve_entitlements:
	logger.debug("auto approving entitlement")
	procurement_api.approve_entitlement(entitlement_id)
	# TODO: we could send an update to the customer giving an approval timeline
	# https://cloud.google.com/marketplace/docs/partners/integrated-saas/backend-integration#sending_a_status_message_to_users
	if product_settings.slack_webhook:
	send_slack_message(product_settings.slack_webhook, entitlement)
	# Nothing to do here, as the approval comes from the UI
	return
	elif event_type == "ENTITLEMENT_ACTIVE":
	if entitlement_state == "ENTITLEMENT_ACTIVE":
	notify("create", entitlement, product_settings.event_topic, publisher)
	return
	elif event_type == "ENTITLEMENT_PLAN_CHANGE_REQUESTED":
	if entitlement_state == "ENTITLEMENT_PENDING_PLAN_CHANGE_APPROVAL":
	# Don't write anything to our database until the entitlement
	# becomes active within the Procurement Service.
	procurement_api.approve_entitlement_plan_change(
	entitlement_id, entitlement["newPendingPlan"]
	)
	return
	elif event_type == "ENTITLEMENT_PLAN_CHANGED":
	if entitlement_state == "ENTITLEMENT_ACTIVE":
	notify("upgrade", entitlement, product_settings.event_topic, publisher)
	return
	elif event_type == "ENTITLEMENT_PLAN_CHANGE_CANCELLED":
	# Do nothing. We approved the original change, but we never recorded
	# it or changed the service level since it hadn't taken effect yet.
	return
	elif event_type == "ENTITLEMENT_CANCELLED":
	if entitlement_state == "ENTITLEMENT_CANCELLED":
	return notify("destroy", entitlement, product_settings.event_topic, publisher)
	elif event_type == "ENTITLEMENT_PENDING_CANCELLATION":
	# Do nothing. We want to cancel once it's truly canceled. For now
	# it's just set to not renew at the end of the billing cycle.
	return
	elif event_type == "ENTITLEMENT_CANCELLATION_REVERTED":
	# Do nothing. The service was already active, but now it's set to
	# renew automatically at the end of the billing cycle.
	return
	elif event_type == "ENTITLEMENT_DELETED":
	# Do nothing. The entitlement has to be canceled to be deleted, so
	# this has already been handled by a cancellation message.
	return