Set DEV_STACK variable if deploying to a dev stack

This forces the autoscale lambda to use smaller tables for DynamoDB to
save money. The production min values are still way too high for use in
the dev stacks.

cloud_formation/configs/dynamolambda.py

@@ -64,6 +64,12 @@
 # written to SLACK_WEBHOOK_PATH.
 VPC_DOMAIN =  'VPC_DOMAIN'
 
+# Used to override normal autoscale rules when creating a developer's stack.
+# All tables will use the autoscale rules defined by the "default" config to
+# avoid spending too much.  The production autoscale rules have minimums that
+# are way too high for DynamoDB tables for developers.
+DEV_STACK = 'DEV_STACK'
+
 def create_config(session, domain):
     """
     Create the CloudFormationConfiguration object.
@@ -166,6 +172,8 @@ def update_config_file(config_str, domain):
         config_str (str): String representation of config file template.
     """
     parser = configparser.ConfigParser()
+    # Disable default transform to lowercase of keys.
+    parser.optionxform = lambda option: option
     parser.read_string(config_str)
     parser.set('default', VPC_DOMAIN, domain)
 
@@ -176,6 +184,10 @@ def update_config_file(config_str, domain):
         parser.set('default', SLACK_WEBHOOK_PATH, slack_path_prod)
     else:
         parser.set('default', SLACK_WEBHOOK_PATH, slack_path_dev)
+        if domain != 'integration.boss':
+            # Override normal autoscale parameters when deploying to a
+            # developer stack.
+            parser.set('default', DEV_STACK, '')
     slack_path = parser.get('default', SLACK_WEBHOOK_PATH)
 
     # Remove stack specific variables before outputting.