Changes to fix the server-related needs of #78725.
* Added authorityZoneId field to UserDto. This allows us to know, without further database requests after retrieving a user, his/her associated zone.
* Added service/dao methods to retrieve the well known text representation of a user's associated zone's geometry.
* Added rest method to give access to the information offered by the previously mentioned dao/service to the web client. This is used to center the view.
Merge branch '8.1-ohiggins-SNAPSHOT' of github.com:luisromangz/persistence-geo into luisromangz-8.1-ohiggins-SNAPSHOT

Conflicts:
	persistence-geo-core/src/main/java/com/emergya/persistenceGeo/dao/impl/ZoneEntityDaoHibernateImpl.java
	persistence-geo-core/src/main/java/com/emergya/persistenceGeo/service/ZoneAdminService.java