ACCUMULO-1443 copy javadoc from TableOperationsImpl to interface

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1484970 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1443 merge to trunk

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1484971 13f79535-47bb-0310-9956-ffa450edef68