revert startup scripts to use key for object name

initializers/groups.yml

@@ -1,9 +1,9 @@
-# - name: applications
+# applications:
 #   users:
 #     - technical_user
-# - name: readers
+# readers:
 #   users:
 #     - reader
-# - name: writers
+# writers:
 #   users:
 #     - writer

initializers/users.yml

@@ -1,10 +1,10 @@
-# - username: technical_user
+# technical_user:
 #   api_token: 0123456789technicaluser789abcdef01234567 # must be looooong!
-# - username: reader
+# reader:
 #   password: reader
-# - username: writer
+# writer:
 #   password: writer
-# - username: jdoe
+# jdoe:
 #   first_name: John
 #   last_name: Doe
 #   api_token: 0123456789jdoe789abcdef01234567jdoe