The exception message, when shade fails, will contain much more
specific information about the failure if the exception is treated
as a string. The 'message' attribute alone is usually not helpful.
have `os_server_facts` call `list_servers` rather than `get_server`, and
treat the `server` parameter as a wildcard pattern. This permits one to
get facts on a single server:
- os_server:
server: webserver1
On mutiple servers:
- os_server:
server: webserver*
Or on all servers:
- os_server:
Introduces a `detailed` parameter to request additional server details
at the cost of additional API calls.
