[8u40] Request for approval: 8031373: Lint warnings in java.util.stream

[Vladimir Ivanov]

Hello,

Please, approve integration of the following change into 8u40:
   8031373: Lint warnings in java.util.stream
   https://bugs.openjdk.java.net/browse/JDK-8031373
   http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/2bb960ae3038

I'd like to get it into 8u40 to minimize difference in JEP210 
implementation [1] between 8u & 9.

Best regards,
Vladimir Ivanov

[1] https://bugs.openjdk.java.net/browse/JDK-8046703