Adding sla statistics
Adding statistics and new method to set actions and failure_tracking

Also included script to generate data to test statistics
Merge branch 'master' of https://github.com/lcostantino/healing-os

Conflicts:
	healing/api/controllers/v1/sla.py
	healing/config.py
Merge branch 'master' of https://github.com/lcostantino/healing-os