Initial support for custom BDs by user's roles

[DimShadoWWW]

Initial support for custom databases by user's roles (used only on a new account registration)

        defaultDBs: {
            private: ['private1'],
            shared: ['shared1']
        },
        customDBs: [
            {
                roles: "client1",
                DBs: {
                    //   private: none
                    //   shared: shared1, shared2
                    shared: ['shared2']    
                },
            },
            {
                roles: "client2",
                DBs: {
                    //   private: none
                    //   shared: private1
                    private: [],
                    shared: ['private1']
                },
            },
            {
                roles: "inspector1",
                DBs: {
                    //   private: private1
                    //   shared: private1_shared, shared3
                    shared: ['private1', 'shared3']
                },
                approach: 'rename' // append '_shared' if name conflict
            }
        ],