added support for slaveDelay value for hosts
added support for slaveDelay value for hosts

warrenpnz/nagios-plugin-mongodb,mzupan/nagios-plugin-mongodb,adrianlzt/nagios-plugin-mongodb,a-yiorgos/nagios-plugin-mongodb,MingjunZhao/Mapscape-Nagios-Mongo,alexp789/nagios-plugin-mongodb,Elbandi/nagios-plugin-mongodb,hdeheer/nagios-plugin-mongodb,cookbooks/nd-nagios-plugin-mongodb