AdaptsTo and Supports don't store default values correctly

[corranwebster]

When running the following code:

from traits.api import AdaptsTo, HasTraits, Instance, Interface, Supports, register_factory           

class ITestInterface(Interface): 
    pass 

class MyClass(HasTraits): 
    pass 

class MyClassTestInterfaceAdapter(HasTraits): 
    object = Instance(MyClass) 
    def __init__(self, object): 
        super().__init__(self, object=object) 

class MyClassTestInterfaceAdapter(HasTraits): 
    object = Instance(MyClass) 
    def __init__(self, object): 
        super().__init__(object=object) 

register_factory(MyClassTestInterfaceAdapter, MyClass, ITestInterface)  

class TestAdaptTraits(HasTraits): 
    supports = Supports(ITestInterface, MyClass, (), {}) 
    adapts_to = AdaptsTo(ITestInterface, MyClass, (), {}) 

t = TestAdaptTraits()                                                  

print('default t.supports:', t.supports)
print('default t.supports_:', t.supports_)

t.supports = MyClass()                                                 

print('set t.supports:', t.supports)
print('set t.supports_:', t.supports_)

print('default t.adapts_to:', t.adapts_to)
print('default t.adapts_to_:', t.adapts_to_)

t.adapts_to = MyClass()                                                 

print('set t.adapts_to:', t.adapts_to)
print('set t.adapts_to_:', t.adapts_to_)

we get output

default t.supports: <__main__.MyClass object at 0x7fd61a97e620>
default t.supports_: <__main__.MyClass object at 0x7fd61a97e620>
set t.supports: <__main__.MyClassTestInterfaceAdapter object at 0x7fd61a97e6d0>
set t.supports_: <__main__.MyClass object at 0x7fd61a97e678>
default t.adapts_to: <__main__.MyClass object at 0x7fd61a97e620>
default t.adapts_to_: <__main__.MyClass object at 0x7fd61a97e620>
set t.adapts_to: <__main__.MyClass object at 0x7fd61a97e728>
set t.adapts_to_: <__main__.MyClassTestInterfaceAdapter object at 0x7fd61a97e780

Notice that the default values of supports and adapts_to are not of the expected types - they have not had adaptation applied to them.

This can probably be fixed by refactoring them to be simpler mapped traits.