RFR: JDK-8282354 : Remove dependancy of TestHttpServer, HttpTransaction, HttpCallback from open/test/jdk/ tests [v4]

[Mahendra Chhipa]

> Updated following remaining tests to remove depenedies of TestHttpServer, HttpTransaction, HttpCallback
> open/test/jdk/java/net/ProxySelector/LoopbackAddresses.java
> open/test/jdk/java/net/ProxySelector/ProxyTest.java
> open/test/jdk/java/net/URL/PerConnectionProxy.java
> open/test/jdk/java/net/URLConnection/B5052093.java
> open/test/jdk/sun/net/www/AuthHeaderTest.java
> open/test/jdk/sun/net/www/http/KeepAliveCache/B5045306.java

Mahendra Chhipa has updated the pull request incrementally with one additional commit since the last revision:

  Implemented the review comments.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7616/files
  - new: https://git.openjdk.java.net/jdk/pull/7616/files/d62ba21c..f2218025

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7616&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7616&range=02-03

  Stats: 27 lines in 6 files changed: 15 ins; 0 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7616.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7616/head:pull/7616

PR: https://git.openjdk.java.net/jdk/pull/7616