Enable CloudWatch Agent install/config in Pro templates

[ferricoxide]

Problem Description:

Pro templates created prior to source-template being configured to install/configure CloudWatch Agent. Need to fix this and ensure that the IAM policy is updated similarly to #20's fix for EE.

Expected Behavior:

EC2 instances deploy in CloudWatch-enabled regions with CloudWatch agent installed and configured

Actual Behavior:

CloudWatch agent not installed and configured — whether in supportable regions or not

(Detailed) Steps to reproduce:

(Optional) Fix recommendation:

Borrow logic from EE templates.