Basic admin user would have ROLE_ACCES_ADMIN, so we have to authorized this role to access admin area
Move getter before load
Rename ROLE_ACCES_ADMIN into ROLE_ADMIN_CMS_ACCESS and split this role into 3 ROLES

ROLE_ADMIN_CMS_WEBSITE_ACCESS
ROLE_ADMIN_CMS_THEME_ACCESS
ROLE_ADMIN_CMS_PAGE_ACCESS
Update core bundle dependencies to add ROLES
Merge pull request #56 from BenoitLeveque/add-roles-in-sandbox

Authorize ROLE_ADMIN_CMS_ACCESS to access admin area