ACCUMULO-1404 make maven-release-plugin include the proper files for binary release artifacts, and rename binary-release tarball to more explicitly describe what it is and to adjust the baseDirectory to match user expectations from prior releases

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1481249 13f79535-47bb-0310-9956-ffa450edef68