Don't decode str in LogStreamingHandler

When we encounter an exception during log streaming we send an error
message through the websocket. However we decode the error message
which is already a str object which doesn't work. Thus the error
message will never arrive at the user. Fix that by just sending the
message.

Change-Id: I488cbfd2bb2f44f10921ab5a0cc16ae9ba4d2537
1 file changed