Improve 3SE datamodel implementation

[rcasteran]

Is your feature request related to a problem? Please describe.

56 introduced type extension mechanism, but 3SE datamodel implementation in datamodel.py still references the following hardcoded types: StateType, TransitionType, FunctionalElementType and ViewType

Describe the solution you'd like

• Remove these hardcoded types by extending the enumerated basic types to the following list:

  DATA = 0
  FUNCTION = 1
  FUNCTIONAL_ELEMENT = 2
  FUNCTIONAL_INTERFACE = 3
  PHYSICAL_ELEMENT = 4
  PHYSICAL_INTERFACE = 5
  STATE = 6
  TRANSITION = 7
  ATTRIBUTE = 8
  VIEW = 9

• Initialize the new elements with the basic type. For example initialize a new attribute with the type : BaseType.ATTRIBUTE

At the end the 3SE datamodel implementation must only contain the following class:

• Function
• Data
• State
• Transition
• FunctionalElement
• FunctionalInterface
• PhysicalElement
• PhysicalInterface
• View
• Attribute
• Type
• BaseType

Describe alternatives you've considered No other alternative is considered