API errors do not get reported on the client side

[Ling Gao]

Put a wrong uuid on the API request the curl command returns the correct error:
#curl -X GET -H 'Content-Type:application/json' http://localhost:6385/v1/nodes/12345678-7f9c-4693-9914-c65912345679
{"error_message": "{\"debuginfo\": null, \"faultcode\": \"Client\", \"faultstring\": \"Node 12345678-7f9c-4693-9914-c65912345679 could not be found.\"}"}

However, place the url on a web browser, it shows the following message:
"A server error occurred. Please contact the administrator."

The actual error message does not get displayed on the browser. This happens for whenever there is an error on the server side.

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/88448

[Dmitry Tantsur (divius)]

Hi Ling Gao,

Change review in question was blocked, do you have some other activity on this bug? If not, please change status as appropriate.
Thank you.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Ruby Loo (<email address hidden>) on branch: master
Review: https://review.openstack.org/88448
Reason: Hi Ling Gao. Thanks for the patch. As mentioned, we don't want Ironic to provide XML support, so I'm going to abandon this.