[master] Fix for https://java.net/jira/browse/GRIZZLY-1547 (Enabling compression leads to truncation of files > 16384 Bytes)
 - Only called finished() when we're dealing with the last
    HttpContent chunk to ensure we use the same compression
    context across the entire data set vs individually
    compressing each chunk.
(cherry picked from commit 1f07e7b7dff8123d6000b2864ddce2cd2ad5dba1)
[master] + fix issue #1549
https://java.net/jira/browse/GRIZZLY-1549
"HttpServletRequest.getServerName() returns null for websocket connection initialization GET requests "