Upgrade Cobalt to use terraform 0.14

[helayoty]

A good user story should be (I-N-V-E-S-T principle)

• Independent (from other user stories, allowing to realize them in any order);
• Negotiable (omit details that would freeze the story);
• Valuable (implementation delivers an increment of functionality, observable by and useful to users);
• Estimable (developers should be able to estimate its size relative to other stories);
• Sizable (implementation fits in one iteration – if it needs many to complete, it is an EPIC);
• Testable (user must be able to check the conditions of satisfaction).

Description

*As a cobalt user, I'd like Cobalt to support the new terraform version 0.14, in order to be able to use the new terraform functionality

Acceptance Criteria

Reference: [Done-Done Checklist] (https://github.com/Microsoft/code-with-engineering-playbook/blob/master/Engineering/BestPractices/DoneDone.md)

• Should run all unit/integration tests for modules
• Should run all unit/integration tests for templates
• Update all README

Also, here are a few points that need to be addressed:

1. Make sure all providers will work fine with the new terraform version (azurerm, etc..)

Resources

Technical Design Document
Mockups

Tasks

Stories are intended to be completed in a single sprint; if task breakdown creates additional work then the team should discuss promoting the Story to an Epic.
Reference: [Minimal Valuable Slices] (https://github.com/Microsoft/code-with-engineering-playbook/blob/master/Engineering/BestPractices/MinimalSlices.md)

Reference: [How to Write Better Tasks] (http://agilebutpragmatic.blogspot.com/2012/04/splitting-story-into-tasks-how-to-write.html)

Assignee should break down work into tasks here