api-ref docs: use correct type for UUIDs

[Louis Fourie]

Description
===========
In http://developer.openstack.org/api-ref/compute/
there many cases where the Type is a string instead of a uuid.
For example tenant_id:

Name In Type Description
tenant_id path string The UUID of the tenant in a multi-tenancy cloud.

should be:
Name In Type Description
tenant_id path uuid The UUID of the tenant in a multi-tenancy cloud.

Also:
Name In Type Description
servers body array List of server objects.
id body string The UUID of the server.

Name In Type Description
servers body array List of server objects.
id body uuid The UUID of the server.

[Gage Hugo (gagehugo)]

Do we need to change it? It seems like we are wanting a string that contains the UUID for each of those fields.

[Markus Zoeller (markus_z) (mzoeller)]

I guess we're talking about JSON data types [1] in the api-ref. There is no "UUID" type in JSON. Which means, for "tenant_id" (and others) it has to be a JSON data type "string" which is a valid UUID. IOW, I think the api-ref uses the correct type.

References:
[1] http://www.tutorialspoint.com/json/json_data_types.htm