ACCUMULO-1516 remove old and unused/unneeded constants and moved server-related constants to server package

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1493947 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1516 remove commented out reference to Constants.NO_AUTHS

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1493952 13f79535-47bb-0310-9956-ffa450edef68