Capitalize project/user domain name

According to official documentation the project and user
domain names should be set to 'Default' value.
https://docs.openstack.org/ocata/install-guide-ubuntu/keystone-openrc.html

Change-Id: I85f2c610b8b8c568ba9c229de20ac1df28e7e601
diff --git a/keystone/files/keystonercv3 b/keystone/files/keystonercv3
index 4152b58..9da173c 100644
--- a/keystone/files/keystonercv3
+++ b/keystone/files/keystonercv3
@@ -1,8 +1,8 @@
 {%- from "keystone/map.jinja" import server with context %}
 export OS_IDENTITY_API_VERSION=3
 export OS_AUTH_URL=http://{{ server.bind.private_address }}:{{ server.bind.private_port }}/v3
-export OS_PROJECT_DOMAIN_NAME=default
-export OS_USER_DOMAIN_NAME=default
+export OS_PROJECT_DOMAIN_NAME=Default
+export OS_USER_DOMAIN_NAME=Default
 export OS_PROJECT_NAME={{ server.admin_tenant }}
 export OS_TENANT_NAME={{ server.admin_tenant }}
 export OS_USERNAME={{ server.admin_name }}