http-client-branch: (cleanup)

http-client-branch: removed AsyncConnection interface and associated methods in subclasses

http-client-branch: remove test that tests removed class

http-client-branch: fixed failing Http1HeaderParserTestDriver.java

http-client-branch: (cleanup) unused imports, unused methods, removed 1 class; typos;

http-client-branch: more test scenarios for RequestBuilderTest

http-client-branch: HPACK.Logger uses DebugLogger

http-client-impl: use Reference.reachabilityFence to make clear the websokect BuilderImpl must stay strongly referenced until after the WebSocketImpl is created.

http-client-branch: additional Header test scenarios

http-client-branch: fix test policy file