Adding Billing Administrator and Purchaser roles

These roles are required for the Store release

@olegrise Please review. Previously I've deployed these changes manually, as needed, but apparently they should just go in now, so I've rebased this branch that @alex-deaconu originally created.
Sorry I don't follow. @olegrise why would it be ||? System administrators (and Billing Administrators) are Rise Vision Company only roles. 

So, if you look at the old line: 
rolesWidget.showRole(UserRole.SYSTEM_ADMINISTRATOR, SelectedCompanyController.getInstance().getUserCompany().isRise() && SelectedCompanyController.getInstance().getSelectedCompany().isRise());
it was removed and replaced with a variable:
boolean companyIsRise;

To summarize, the User Company has to be Rise and (&&) the Selected Company has to be Rise.

Thanks.