slapos_payzen: change coding style

master/bt5/slapos_payzen/SkinTemplateItem/portal_skins/slapos_payzen/Currency_getIntegrationMapping.py

@@ -3,10 +3,10 @@ relative_url = context.getRelativeUrl()
 
 if relative_url == 'currency_module/CNY':
   integration_site = portal.restrictedTraverse(portal.portal_preferences.getPreferredWechatIntegrationSite())
-else:
+elif relative_url == 'currency_module/EUR':
   integration_site = portal.restrictedTraverse(portal.portal_preferences.getPreferredPayzenIntegrationSite())
+else:
+  # Only EUR is supported for now
+  assert relative_url in ('currency_module/EUR', 'currency_module/CNY')
 
-
-# Only EUR is supported for now
-assert relative_url in ('currency_module/EUR', 'currency_module/CNY')
 return integration_site.getMappingFromCategory('resource/%s' % relative_url).split('/', 1)[-1]