Temporarily use a non-default branch of cisagov/ansible-role-cloudwat…

…ch-agent

This is being done for testing purposes and can be reverted once
cisagov/ansible-role-cloudwatch-agent#58 has been merged.

src/requirements.yml

@@ -16,6 +16,7 @@ roles:
     src: https://github.com/cisagov/ansible-role-clamav
   - name: cloudwatch_agent
     src: https://github.com/cisagov/ansible-role-cloudwatch-agent
+    version: improvement/use-drop-in-conf-file
   - name: crowdstrike
     src: https://github.com/cisagov/ansible-role-crowdstrike
   - name: freeipa