Fixed order of callbacks in Hub Unit test (#221)

Author: royjit

AmplifyTests/CategoryTests/Hub/DefaultPluginTests/AutoUnsubscribeHubListenToOperationTests.swift

@@ -151,9 +151,10 @@ class AutoUnsubscribeHubListenToOperationTests: XCTestCase {
             return
         }
 
-        operation.doMockDispatch(event: .completed(StorageListResult(items: [])))
         operation.doMockDispatch(event: .inProcess(()))
-        wait(for: [listenerWasInvokedForInProcess, listenerWasInvokedForCompleted], timeout: 0.5)
+        wait(for: [listenerWasInvokedForInProcess], timeout: 0.1)
+        operation.doMockDispatch(event: .completed(StorageListResult(items: [])))
+        wait(for: [listenerWasInvokedForCompleted], timeout: 0.1)
 
         operation.doMockDispatch(event: .failed(StorageError.accessDenied("", "")))
         wait(for: [listenerWasInvokedForFailed], timeout: 0.1)