java.lang.ClassCastException inside TopDocumentQueryExecutionContext

[xinlian12]

Exception stacktrace:
java.lang.ClassCastException: com.azure.cosmos.implementation.query.AggregateDocumentQueryExecutionContext cannot be cast to com.azure.cosmos.implementation.query.ParallelDocumentQueryExecutionContextBase
at com.azure.cosmos.implementation.query.TopDocumentQueryExecutionContext.getContextFromComponent(TopDocumentQueryExecutionContext.java:150)

[xinlian12]

Code merged into master.