public String getBootSetupAgentPassword() {
    String pass = configsMap.get(PASSPHRASE.getKey());

    if (null != pass) {
      return pass;
    }

    // fallback
    return getProperty(BOOTSTRAP_SETUP_AGENT_PASSWORD);
  }
@return conventional Java version number, e.g. 7.
Integer is used here to simplify comparisons during usage.
If java version is not supported, returns -1
ambari-server/src/main/java/org/apache/ambari/server/configuration/Configuration.java