libs/web: Return more verbose error messages when template execution fails
libs/web: Return more verbose error messages when template execution fails

8devices/luci,8devices/luci,deepak78/luci,deepak78/luci,8devices/luci,8devices/luci,deepak78/luci,8devices/luci,deepak78/luci,deepak78/luci,deepak78/luci,8devices/luci,deepak78/luci,deepak78/luci