Provide implementation to parse monitoring template in TOSCA library

The template deploys nodejs, nginx, monbodb, elasticsearch, logstash and
kibana as well collectd and rsyslog. The current patch covers nodejs and
mongodb.

Partially implements: blueprint enable-monitoring
Closes-Bug: #1369109

Change-Id: Ice602153c9b04ed11be48c6fec83fad8bda1c83a