ENYO-2063: templates are located using `url:` only

- former `alternateUrl:` is fed into `url:` semantics.
- update location of bookplate for 2.2.0 & 2.1.1.

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>