[BUG] False positive exception on statement close

[lyndonbauto]

Describe the bug

Close invokes cancelQuery which dumps out a false positive exception.

2021-12-14 14:07:54.417 FINE 296 [pool-4-thread-15 - s.flush] java.sql.SQLException: Cannot cancel query, it is either completed or has not started.
at software.aws.neptune.jdbc.utilities.SqlError.createSQLException(SqlError.java:154)
at software.aws.neptune.jdbc.utilities.QueryExecutor.cancelQuery(QueryExecutor.java:223)
at software.aws.neptune.jdbc.Statement.close(Statement.java:91)
at jdk.internal.reflect.GeneratedMethodAccessor81.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.onseven.dbvis.jdbc.b.c.b(Z:3273)
at com.onseven.dbvis.jdbc.b.g$_b.call(Z:3572)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
SQLException: SQLState(HY008)