Mongodb cacti monitor plugins

Mongodb cacti monitor plugins: download from : https://github.com/arstercz/mongodb-cacti-plugins

require and features:

1. require mongo client command should be find by PATH( export PATH=$PATH:mongo_client_path)
2. user and passwd can be set in conf file.
3. cacti template is from percona monitor pluings for mongodb.
4. enable mutiple port monit.