Fix some test error

Author: ningyougang

tests/src/test/scala/org/apache/openwhisk/operation/RuntimeConfigurationTests.scala

@@ -52,7 +52,7 @@ class RuntimeConfigurationTests
 
   val kind = "nodejs:10"
   val memory = 128
-  var count = new Random().nextInt(3) + 1
+  var initialCount = new Random().nextInt(3) + 1
 
   def getRuntimes = {
     s"""    {
@@ -71,7 +71,7 @@ class RuntimeConfigurationTests
                                  "attachmentType": "text/plain"
                                },
                                "stemCells": [{
-                                 "count": ${count},
+                                 "initialCount": ${initialCount},
                                  "memory": "${memory} MB"
                                }]
                              }]
@@ -122,7 +122,7 @@ class RuntimeConfigurationTests
         val nodejs10ContainerData = prewarmContainerDataList.items.filter { prewarmContainerData =>
           prewarmContainerData.kind == kind && prewarmContainerData.memory == memory
         }
-        nodejs10ContainerData.head.number shouldBe count
+        nodejs10ContainerData.head.number shouldBe initialCount
       }
   }
 }