Support: Container Metrics collection and Visualization

Support: Container Metrics collection and Visualization

A. Collector: Add cAdvisor Collector
   This patch adds supports for Container Metrics
   collection using cAdvisor. The collector:
     1. Pushes metrics to InfluxDB storage
     2. Stores metrics locally in Result Dir
     3. Implements print_results() for metric summary
     4. Is configurable from 05_collector.conf

B. Docker: Grafana Dashboard
   This patch also adds JSON file for Grafana Dashboard for
   Container Metrics

Signed-off-by: Parth Yadav <parth.yadav@ramanujan.du.ac.in>
Change-Id: I7c39d4e1a7a46d3a499a241e618bd0da7eed53a8