Zabbix

...G...... [DEV-1215] implemented system.swap.in and system.swap.out metrics in native go

* commit '63922185fd03771d430fed6ebee7f2c9cbe945e4':
  ...G...... [DEV-1215] fixed coding style
  ...G...... [DEV-1215] fixed getSwapStats()
  ...G...... [DEV-1215] fixed if statements
  ...G...... [DEV-1215] fixed merge errors
  ...G...... [DEV-1215] fixed compilation
  ...G...... [DEV-1215] fixed error messages
  ...G...... [DEV-1215] implemented system.swap.in/out metric in native go