Users View

[tpokora]

• [x] Show Users list
• [x] Save User in DB
• [x] Create User Form
• [x] Validate Create user form data
• [x] Validate Create user form data - errors propagation
• [x] Validate username and email availability
• [x] Roles list view
• [x] Create Roles Form
• [x] Validate Roles form data
• [x] Add users list filter
• [x] UserService Tests
• [x] AuthService Tests
• [x] AuthViewService Tests