ByteArrayResponseWrapper should override more methods to control response commit state

[joakime]

The current ByteArrayResponseWrapper makes a bad assumption that .getWriter() is only ever used when calling a filter chain from the DandelionFilter.

The ByteArrayResponseWrapper should also override the following methods and either prevent them from going down to the wrapped delegate, or toss an exception if attempted to be used (indicating bad runtime assumptions in the filter chain)

• sendError() - this commits the response and closes the connection
• sendRedirect() - again, this commits the response, and you don't support it using servlet spec, you do it yourself
• getResponse() - downstream shouldn't be allowed to unwrap to a base response object
• getOutputStream() - use of this should not be allowed
• flushBuffer() - this commits the response and should not be allowed when the DandelionFilter is being used
• reset() - either implement this or declare it unsupported
• resetBuffer() - either implement this or declare it unsupported