component definition custom properties as dictionary

[mizrael]

Updated the implementation of custom properties on component definitions to use a dictionary instead of an array.
This allows the serializer to output YAML in this form:

Component: 
Name: Component1
CustomProperties:
  MyFuncProp1:
    Direction: Input
    Parameters:
      param1:
        DataType: String
        IsRequired: true

instead of

Component: 
Name: Component1
CustomProperties:
- Name: MyFuncProp1
  Direction: Input
  PropertyType: Function
  DataType: String
  Category: Data
  IsResettable: false
  Default: lorem
  Parameters:
  - Name: param1