🐛(edxapp) fix edxapp image used in development

ginkgo.1-1.0.3-dev docker image has permission issues to run Celery
workers. This issue has been fixed since, so we must upgrade to the
latest release to make Celery workers fully functionnal in development
env_type.

group_vars/env_type/development.yml

@@ -2,7 +2,7 @@
 domain_name: "{{ lookup('env', 'OPENSHIFT_DOMAIN') }}.nip.io"
 
 # Use development images in the development environment
-edxapp_image_tag: "ginkgo.1-1.0.3-dev"
+edxapp_image_tag: "ginkgo.1-1.0.6-dev"
 richie_image_tag: "0.1.0-alpha.3-alpine-dev"
 
 apps: