[Heat] Initial values aren't displaying properly in "Launch Stack" form

[Tatiana Ovchinnikova]

Using json type default data in a template causes annoying inconsistencies in the second step of creating a stack. For example for this template:

heat_template_version: 2013-05-23
parameters:
  key:
    type: string
    default: key
    description: This is keypair to access into your stack.
  db_password:
    type: string
    default: secrete
    hidden: true
  metadata:
    type: json
    default: {"keyvalue": 5}

on the second step there would be "metadata" field with initial value {u'keyvalue': 5}. That is not valid JSON, and pressing "Launch" button would show: "Expecting property name enclosed in double quotes".

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/168850

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/168850
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=eeba3b4b57b041fef73f85e9c6eb63e333980590
Submitter: Jenkins
Branch: master

commit eeba3b4b57b041fef73f85e9c6eb63e333980590
Author: Tatiana Ovchinnikova <email address hidden>
Date: Mon Mar 30 13:30:17 2015 +0300

    [Heat] Fix default values displaying for "Launch Stack"

    This patch set fixes default values displaying for JSON parameters
    to make it possible to use them without any changes.

    Closes-Bug: #1438138

    Change-Id: Ib925dc39320f7cab240eed3ccbcf1fa574bc5507