Merge pull request #168 from rjnagal/master

Factor out data comparator for storage tests.
Merge pull request #169 from rjnagal/master

Improve influxdb backend - use container alias if available and store network stats.
Merge remote-tracking branch 'upstream/master'

Docker-DCO-1.1-Signed-off-by: Rohit Jnagal <jnagal@google.com> (github: rjnagal)