Stack attributes were used the wrong way after a stack creation.

The previous commit https://review.openstack.org/#/c/83911/
fixed the circular reference Error by passing the raw file to
the heat client.

Actually, it was the only part that needed to be changed. With the
current code, the stack is created bu after that,we cannot get the
description from the template file.

This patch also removes the "get" call to the heat client. All the
info we need is given by the response of the create call.

Fixes bug #1300121

Change-Id: Ib84e1c0e402e8fb5de085933fa4aca6f33213aad
Add 'application_uri' attribute to assembly DB schema

This would be the uri of the DU where the user application gets deployed.
The uri will be of the form http://<ip>:<port>.
Adding this uri to the assembly schema as a temporary hack. 
We can revisit this later.

Change-Id: I0ae9364ecc28991e50778b7e2899b0dd2934904e
Merge "Add 'application_uri' attribute to assembly DB schema"