Execution creation is failed, if created using workflow id

[Hardik Parekh]

When we create execution using workflow id . it is getting fail.

2016-02-23 18:06:35.702 ERROR wsme.api [-] Server-side error: "'workflow_name'". Detail:
Traceback (most recent call last):

  File "/usr/local/lib/python2.7/dist-packages/wsmeext/pecan.py", line 84, in callfunction
    result = f(self, *args, **kwargs)

  File "/opt/stack/mistral/mistral/api/controllers/v2/execution.py", line 235, in post
    exec_dict.get('workflow_id', exec_dict['workflow_name']),

KeyError: 'workflow_name'

[Nikolay Makhotkin (nmakhotkin)]

Related fix: https://review.openstack.org/#/c/283913/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/283913
Committed: https://git.openstack.org/cgit/openstack/mistral/commit/?id=4878202c0e2a404c0b38b8db53728dde98403797
Submitter: Jenkins
Branch: master

commit 4878202c0e2a404c0b38b8db53728dde98403797
Author: hardik <email address hidden>
Date: Wed Feb 24 11:48:30 2016 +0900

    Fixed 'workflow_name' key error

    when workflow execution is created by workflow_id
    'workflow_name' key error was raised. Now 'workflow_name'
    is extracted from dictionary using get() function.

    Change-Id: I5a648742b2653818d3bc4d4025ce1fe0b73a2d24
    Closes-bug: #1549047