Modified some templates for icmpping item.

Hi Jean,

icmpping item/value was treated as round-trip time in your templates,
so I modified them as following...

- deleted value unit(ms) and  changed data type to boolean for icmpping item
- added icmppingloss item/trigger to zbx-fortinet-envmon same as zbx-cisco-envmon.

I think icmppingsec item should be used if getting icmp response time.

Would you merge these changes?

Regards,