OO-3297: refactor the user management to use organization for managing the roles instead of named security groups

OO-3288, OO-3297, OO-3291: add model for organisations and curriculums, add curriculum manager global role

OO-1867: upgrade selenium and arquillian libraries to support Firefox 46 and update the tests to work with them

OO-1068: fix RS in user settings if the charset of the user is not in the list of the available ones

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branch : bps