Fix type mismatch error

Author: ningyougang

core/invoker/src/main/scala/org/apache/openwhisk/core/containerpool/v2/FunctionPullingContainerProxy.scala

@@ -1032,7 +1032,8 @@ class FunctionPullingContainerProxy(
       case _: WarmData =>
         Future.successful(None)
       case _ =>
-        val owEnv = (authEnvironment ++ environment + ("deadline" -> (Instant.now.toEpochMilli + actionTimeout.toMillis).toString.toJson)) map {
+        val owEnv = (authEnvironment ++ environment ++ Map(
+          "deadline" -> (Instant.now.toEpochMilli + actionTimeout.toMillis).toString.toJson)) map {
           case (key, value) => "__OW_" + key.toUpperCase -> value
         }
         container