Datastore (root) tests have some unexpected messages

[lesv]

Investigate and verify that these IT results are expected -- some of these appear scary.

INFO: [datastore] Exception when handling request: INVALID_ARGUMENT: The first sort property must be the same as the property to which the inequality filter is applied.  In your query the first sort property is created but the inequality filter is on priority
Aug 30, 2017 5:23:54 PM com.google.cloud.testing.BlockingProcessStreamReader writeLog
INFO: [datastore] Exception when handling request: INVALID_ARGUMENT: Only one inequality filter per query is supported.  Encountered both created and priority
Aug 30, 2017 5:23:55 PM com.google.cloud.testing.BlockingProcessStreamReader writeLog
INFO: [datastore] Exception when handling request: INVALID_ARGUMENT: The first sort property must be the same as the property to which the inequality filter is applied.  In your query the first sort property is created but the inequality filter is on priority
Aug 30, 2017 5:23:56 PM com.google.cloud.testing.BlockingProcessStreamReader writeLog
SEVERE: [datastore] LEAK: ByteBuf.release() was not called before it's garbage-collected. Enable advanced leak reporting to find out where the leak occurred. To enable advanced leak reporting, specify the JVM option '-Dio.netty.leakDetection.level=advanced' or call ResourceLeakDetector.setLevel() See http://netty.io/wiki/reference-counted-objects.html for more information.
[datastore] *** shutting down gRPC server since JVM is shutting down
[datastore] *** server shut down
Aug 30, 2017 5:23:57 PM com.google.cloud.testing.BlockingProcessStreamReader writeLog
INFO: [datastore] scheduler shutting down.

[broady]

Frank, please take a look (or close). Thanks!

[kurtisvg]

This error is no longer occurring in the logs, and was probably fixed during the initial test migration to Kokoro.