RFR 8151281: Module java.httpclient could use System.Logger instead of PlatformLogger

[Daniel Fuchs]

Please find below a patch for:

https://bugs.openjdk.java.net/browse/JDK-8151281
8151281: Module java.httpclient could use System.Logger
         instead of PlatformLogger

http://cr.openjdk.java.net/~dfuchs/webrev_8151281/webrev.00/

best regards,

-- daniel