removing weight from H2PushPriority with dependency 'before' as on stream...

removing weight from H2PushPriority with dependency 'before' as on stream close, priorities would not be as before otherwise

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1718400 13f79535-47bb-0310-9956-ffa450edef68