CBQE-1490 Automate cbhealthchecker with basic verification-My farewell commit!

Basically, we check cbhealthchecker command output information
and look into the reports folder this tool generates. Make sure
html, txt, json reports are not empty.
Change-Id: I96b977f2bb228d41cdbf45d1704edfa157c14a9e
Reviewed-on: http://review.couchbase.org/28049
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>
Tested-by: Chisheng Hong <chisheng@couchbase.com>