public static long addContent(Table updater, String family, String column) throws IOException {
    return addContent(updater, family, column, START_KEY_BYTES, null);
  }
Add content to region <code>r</code> on the passed column <code>column</code>. Adds data of the
from 'aaa', 'aab', etc where key and value are the same.
@return count of what we added.
hbase-server/src/test/java/org/apache/hadoop/hbase/HTestConst.java