CBQE-0: store_report_cbfs with txt,json,html files

correct command to store only txt,json,html files
find . -type f \( -name "*.txt" -o -name "*.html" -o -name "*.json" \)

Change-Id: I36277aa53e5a109169a661f5de696ae7f2c79a17
Reviewed-on: http://review.couchbase.org/27760
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>