public void setBackgroundCommand(boolean isBackgroundCommand) {
    this.isBackgroundCommand = isBackgroundCommand;
  }
Sets whether this command runs in the background and does not block other
commands.

@param isBackgroundCommand
         {@code true} if this command runs in the background, {@code false}
         otherise.
ambari-server/src/main/java/org/apache/ambari/server/actionmanager/HostRoleCommand.java