 Provide more verbose error for alert rule json parsing
 Provide more verbose error for alert rule json parsing

Signed-off-by: Chris Goller <ca2248b034ea873fc4f24500b8a0a0828575d45e@gmail.com>

li-ang/influxdb,influxdata/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,li-ang/influxdb,influxdata/influxdb,influxdb/influxdb,influxdb/influxdb,influxdb/influxdb,nooproblem/influxdb,nooproblem/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb