Using '0' instead of '-' in overview page.

When there is no data in the project, Usage Summary in overview page
always show '-' for `Active Instances` and other values, it would be
better showing '0' instead '-'.

Change-Id: I121de36ac9dc5ced2218c08b82a8b2e4a3d5e459
Closes-bug: 1288015
Decrypt and display VM generated password

Add optional Retrieve Password action on instance that allows users
to decrypt, on client side, the password generated for the Admin
session.

Change-Id: I37cc93ae7871bf78e90513f58e169883fbfd1621
Implements: blueprint decrypt-and-display-vm-generated-password
Merge "Using '0' instead of '-' in overview page."
Merge "Decrypt and display VM generated password"