RFR(s): 8169196: [TESTBUG] Three tests from sun/net/www have undeclared dependencies

[Sergei Kovalev]

Hi Team,

Please review one more small fix for module dependencies issue.
Bug ID: https://bugs.openjdk.java.net/browse/JDK-8169196
WebRev: http://cr.openjdk.java.net/~skovalev/8169196/webrev.00/index.html

Added missed dependency on jdk.httpserver. Also shell test converted to 
pure java test.

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With best regards,
Sergei