Feature #4149 : user account validity
- modifying database structure around users
- modifying unit tests datasets around users
- modifying models and query mechanism around users
- adding columns into ST_User for next features
- deleted users are retrieved by their state and no more by access level
- changing the management of user accessLevel information
- removing some dead code
- centralizing/refactoring some code
Merge branch 'master' into feature-4149
Feature #4149 : user account validity
- adding action menus to block or unblock users (administration)
- adding blocked user management around user log in
- adding blocked user management around WEB-Services
- adding blocked user management around user blocked whereas a session is alive
- formatting the jsp files at webapp root
- formatting userContent.jsp file
- adjusting some unit tests
Merge branch 'master' into feature-4149

Conflicts:
	war-core/src/main/webapp/defaultLogin.jsp
Merge branch 'feature-4149' of https://github.com/SilverYoCha/Silverpeas-Core into ych-feature4149
integrating feature #4149
adding new column "last connection" when browsing domains and groups
using generic terms instead of specific ones
removing useless terms in multilang files
replacing some old code