[DSL] Action return as list of strings is failed to serialize

[Ekaterina Chernova]

In class definition we have

Methods:
  testAction:
    Usage: Action
    Body:
      - sleep(60)
      - Return: ['a', 'b']

And murano engine is failed to parse the result http://pastebin.com/7D4UuCYN

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/167201

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/167201
Committed: https://git.openstack.org/cgit/stackforge/murano/commit/?id=4e54b4ef4c91a8bc9ebe697f1ae9c1925e37f513
Submitter: Jenkins
Branch: master

commit 4e54b4ef4c91a8bc9ebe697f1ae9c1925e37f513
Author: Stan Lagun <email address hidden>
Date: Tue Mar 24 15:56:43 2015 +0300

    Fixes action result serialization

    Attempt to serialize value that contained array of strings caused
    endless recursion.

    Change-Id: I5fe5b30b6d7ad6521a00ac3cbad21dccd812791d
    Closes-Bug: #1435437