[Test only] Move deflate tests from PerMessageCompressTest to PerMessageDeflateTest

- empty message test
- message with null character test

After clean up, we'll delete permessage-compress support and
PerMessageCompressTest

R=yhirano@chromium.org

Review URL: https://codereview.appspot.com/97700043

git-svn-id: http://pywebsocket.googlecode.com/svn/trunk@803 4ff78f4a-9131-11de-b045-6380ec9940d4
Remove perframe-compress extension support

Tests are kept and will be run against deflate-frame

R=yhirano@chromium.org

Review URL: https://codereview.appspot.com/100690043

git-svn-id: http://pywebsocket.googlecode.com/svn/trunk@804 4ff78f4a-9131-11de-b045-6380ec9940d4