428435 - Large streaming message fails in MessageWriter.

Fixed buffering, synchronization and callback notification in the
websocket stream implementation classes.
Fixing WebSocketSession.suspend()
Removed UpgradeContext since it was not used.
Reduced websocket memory footprint by releasing the HTTP machinery
(request and response) after the upgrade.
428859 Do not auto initialise jsr356 websocket if no annotations or EndPoints discovered
429180 - Make requestlog filename parameterized

+ made filename and filenameDateFormat parameterized
jetty-util is a hard dependency for jetty-jndi

+ jetty-util is needed because of jetty logging
+ jetty-util was being pulled in via jetty-webapp but only
  as a provided dependency.
429409 [osgi] jetty.websocket.servlet must import jetty.websocket.server
Merge remote-tracking branch 'upstream/master' into quick-start