Improve logging of health enpoint

[groezing]

Randomly the monitoring service evaluates the result of the /health call as error and opens an Pager duty alarm with the error message:
output: 'Failed: trigger was never started',

To better investigate the root cause there will be added log statements to the health point response.

e.g : add to health.js

line 44 in an else statement
monitorStatusString = JSON.stringify(monitorStatus, null, 4);
logger.info(method, triggerNamePrefix, 'reported monitor status is', monitorStatusString);

and at line 85
monitorStatusString = JSON.stringify(monitorStatus, null, 4);
logger.info(method, triggerNamePrefix, 'To few elements exist in monitorStatus : ',monitorStatusString );