DEVOPS-12330: adds check for ASG size of 0

[taoistmath]

Tested by updating ciq on saltmaster to point to this branch, then highstated ciq agent:

----------
          ID: License2Deploy
    Function: pip.installed
        Name: git+https://github.com/taoistmath/License2Deploy.git@DEVOPS-12330
      Result: True
     Comment: All packages were successfully installed
     Started: 15:53:25.425225
    Duration: 2087.694 ms
     Changes:   
              ----------
              git+https://github.com/taoistmath/License2Deploy.git@DEVOPS-12330==???:
                  Installed

Then ran verified-service_qa_deploy_ami which has ASG desired capacity set to 0 and saw immediate failure:

passing Travis build:

Testing evidence that my changes are being tested:

[coveralls]

Coverage decreased (-2.6%) to 94.314% when pulling 0382e2c on taoistmath:DEVOPS-12330 into 7b0b0df on dandb:master.