ACCUMULO-878 spelling/grammer

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1432926 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-878 removed "an" from comments

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1432928 13f79535-47bb-0310-9956-ffa450edef68