test(datastore): fix broken datastore observeQuery integ tests #872

Job	Run time
Build Amplify Swift for iOS / Build Amplify-Package \| iOS	5m 27s
Build Amplify Swift for macOS / Build Amplify-Package \| macOS	5m 50s
Build Amplify Swift for tvOS / Build Amplify-Package \| tvOS	5m 7s
Build Amplify Swift for watchOS / Build Amplify-Package \| watchOS	5m 37s
Confirm Passing Build Steps	1s
	22m 2s

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