RFR [14] 8232367: Update the jdk/java/net/httpclient tests to RS TCK 1.0.3

[Chris Hegarty]

The RS TCK tests added by 8226602 are based on version 1.0.2. There is a newer version 1.0.3 available.

In what is in the test area of the JDK repo, there are only trivial minor stability changes between 1.0.2 and 1.0.3, but seems worth pulling in, if only to not have to continually remember/monitor the differences.

https://cr.openjdk.java.net/~chegar/8232367/webrev.00/

-Chris