RFR: JDK-8273142 : Remove dependancy of TestHttpServer, HttpTransaction, HttpCallback from open/test/jdk/sun/net/www/protocol/http/ tests

[Mahendra Chhipa]

Dependencies of TestHttpServre, HttpTransaction, HttpCallback are removed from following tests:
open/test/jdk/sun/net/www/protocol/http/ResponseCacheStream.java
open/test/jdk/sun/net/www/protocol/http/SetChunkedStreamingMode.java
open/test/jdk/sun/net/www/protocol/http/RelativeRedirect.java
open/test/jdk/sun/net/www/protocol/http/B6296310.java

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Commit messages:
 - JDK-8273142 : Remove dependancy of TestHttpServer, HttpTransaction, HttpCallback from open/test/jdk/sun/net/www/protocol/http/ tests

Changes: https://git.openjdk.java.net/jdk/pull/5352/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5352&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273142
  Stats: 181 lines in 4 files changed: 79 ins; 25 del; 77 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5352.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5352/head:pull/5352

PR: https://git.openjdk.java.net/jdk/pull/5352