Create test suite for types defined by NamedTuple

[markheger]

1. Required types:

• str
• bool
• int
• float
• Decimal
• complex
• bytes
• List[T]
• Set[T]
• Mapping[T]
• Optional[T]

2. Nesting of the above types, as well as custom types - for example:

class Address(NamedTuple):
    street: str
    city: str
    state: str
class Person(NamedTuple):
    name: str
    age: float
    address: Address
    children: List[Person]

[markheger]

test suite has been delivered as foundation work for #1679 : https://github.com/IBMStreams/streamsx.topology/blob/master/test/python/topology/test2_namedtuple.py