heat-api validate template method returns 500 and stacktrace when json parser fails

[konrad-k]

When I call template validate method on heat rest api: POST "/v1/{tenant_id}/validate"
and "template" parameter is a not a valid json
then 500 with stacktrace is returned.

I would expect to return the response which indicates that the template is invalid, instead of internal application error code.

Affected version is the version with commit id: e098963e8617d32909795c9b389dee848b637636.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/20141

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/20141
Committed: http://github.com/openstack/heat/commit/8a572c0b887a58df9bace67d567337a08ba3af18
Submitter: Jenkins
Branch: master

commit 8a572c0b887a58df9bace67d567337a08ba3af18
Author: Zane Bitter <email address hidden>
Date: Mon Jan 21 16:36:21 2013 +0100

    ReST API: Return 400 for malformed JSON input

    Previously we had an unhandled exception that resulted in a 500 (Internal
    Server Error) result and a stack trace when an invalid JSON file was
    submitted in a POST/PUT request. Change to catching the exception and
    returning a 400 (Bad Request) result.

    bug 1102391

    Change-Id: I7dde33ae732d9addbf988b1d36d4f06eacb634bf
    Signed-off-by: Zane Bitter <email address hidden>