Fix issue #1156

Fix as suggested in the issue.

https://github.com/ansible/ansible-modules-core/issues/1156

cloud/amazon/route53.py

@@ -209,7 +209,7 @@ def main():
 
     command_in              = module.params.get('command')
     zone_in                 = module.params.get('zone').lower()
-    ttl_in                  = module.params.get('ttl')
+    ttl_in                  = int(module.params.get('ttl'))
     record_in               = module.params.get('record').lower()
     type_in                 = module.params.get('type')
     value_in                = module.params.get('value')