Add config-drive in parameter_defaults

We added support to explicitly request config-drive
for BMC and Undercloud type instances in [1]. Default
is false.

Adding similiar option in parameter_defaults will ease overriding
environments/base.yaml in ovb-manage role generate_template.yml[2].

[1] 306ec29aec
[2] https://github.com/rdo-infra/review.rdoproject.org-config/blob/master/roles/ovb-manage/tasks/generate_template.yml#L13

Change-Id: I7bbdc80684147c72561c0434b3217e41bd2a0995

environments/base.yaml

@@ -33,6 +33,10 @@ parameter_defaults:
   # Type: string
   bmc_prefix: bmc
 
+  # If True, enable config drive on the server.
+  # Type: boolean
+  config_drive: False
+
   # An external network from which floating ips can be provisioned
   # Type: string
   external_net: external

sample-env-generator/environments.yaml

@@ -3,6 +3,9 @@ environments:
     title: Base Configuration Options
     description: Basic configuration options needed for all OVB environments
     files:
+      templates/bmc.yaml:
+        parameters:
+          - config_drive
       templates/quintupleo.yaml:
         parameters:
           - bmc_flavor