@Override
  protected ConsoleReader createConsoleReader() {
    ConsoleReader consoleReader = super.createConsoleReader();
    consoleReader.setHistory(gfshHistory);
    terminal = consoleReader.getTerminal();
    return consoleReader;
  }
Executes the given command string. We have over-ridden the behavior to extend the original
implementation to store the 'last command execution status'.

@param line command string to be executed
@return true if execution is successful; false otherwise
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/shell/Gfsh.java