grafana: permit id_token_attribute_name configuration in generic oauth

Author: psycofdj

jobs/grafana/spec

@@ -432,6 +432,8 @@ properties:
     description: "Generic OAuth name attribute path"
   grafana.auth.generic_oauth.role_attribute_path:
     description: "Generic OAuth role attribute path"
+  grafana.auth.generic_oauth.id_token_attribute_name:
+    description: "Attribute name to read token from token authorization response"
   grafana.auth.generic_oauth.auth_url:
     description: "Generic OAuth url"
   grafana.auth.generic_oauth.token_url:

jobs/grafana/templates/config/grafana.ini

@@ -840,6 +840,10 @@ name_attribute_path = <%= name_attribute_path %>
 role_attribute_path = <%= role_attribute_path %>
 <% end %>
 
+<% if_p('grafana.auth.generic_oauth.id_token_attribute_name') do |id_token_attribute_name| %>
+id_token_attribute_name = <%= id_token_attribute_name %>
+<% end %>
+
 <% if_p('grafana.auth.generic_oauth.auth_url') do |auth_url| %>
 auth_url = <%= auth_url %>
 <% end %>