spira.Port does not connect to correct process, without process parameter

[JCoetzee123]

Title

spira.Port does not connect to correct process, without process parameter

Steps to reproduce:

import spira and desired RDD

import spira.all as spira
from spira.technologies.mit.process.database import RDD

create a class of type PCell, desired box element and ports

class Resistor(spira.PCell):

    width = spira.NumberParameter(default=spira.NUMBER(2))
    length = spira.NumberParameter(default=spira.NUMBER(5), doc='Length of the shunt resistance.')

    def validate_parameters(self):
        if self.width > self.length:
            raise ValueError('`Width` cannot be larger than `length`.')
        return True

    def create_elements(self, elems):
        elems += spira.Box(width=self.length, height=self.width, center=(0,0), layer=spira.RDD.PLAYER.R5.METAL)
        return elems
    def create_ports(self, ports):
        w, l = self.width, self.length
        ports += spira.Port(name='P1_R5', midpoint=(-l/2,0), orientation=180, width=self.width)
        ports += spira.Port(name='P2', midpoint=(l/2,0), orientation=0, width=self.width, process=spira.RDD.PROCESS.R5)
        return ports

D = Resistor()

####Expected behavior:
Script should execute without errors as naming convention of ports should connect P1 to the R5 process

####Current behavior (incorrect):

[SPiRA] Version 0.1.1-Auron [Beta] - MIT License
---------------------------------------------
Traceback (most recent call last):
  File "tests/testpy.py", line 24, in <module>
    D.gdsii_output("tests/testpy")
  File "/home/johannes/Documents/spira-next/env/lib/python3.7/site-packages/spira/yevon/aspects/output.py", line 34, in gdsii_output
    D = deepcopy(self)
  File "/usr/lib/python3.7/copy.py", line 161, in deepcopy
    y = copier(memo)
  File "/home/johannes/Documents/spira-next/env/lib/python3.7/site-packages/spira/yevon/gdsii/cell.py", line 185, in __deepcopy__
    ports=deepcopy(self.ports)
  File "/home/johannes/Documents/spira-next/env/lib/python3.7/site-packages/spira/core/parameters/descriptor.py", line 96, in __get__
    value = self.call_param_function(obj)
  File "/home/johannes/Documents/spira-next/env/lib/python3.7/site-packages/spira/yevon/geometry/ports/port_list.py", line 234, in call_param_function
    value = f(self.__type__())
  File "/home/johannes/Documents/spira-next/env/lib/python3.7/site-packages/spira/yevon/aspects/port.py", line 37, in __create_ports__
    return self.create_ports(ports)
  File "tests/testpy.py", line 19, in create_ports
    ports += spira.Port(name='P1_R5', midpoint=(-l/2,0), orientation=180, width=self.width)
  File "/home/johannes/Documents/spira-next/env/lib/python3.7/site-packages/spira/yevon/geometry/ports/base.py", line 124, in __call__
    name, process = cls._bind_process_to_name(kwargs)
  File "/home/johannes/Documents/spira-next/env/lib/python3.7/site-packages/spira/yevon/geometry/ports/base.py", line 84, in _bind_process_to_name
    raise ValueError(error_message.format(port_data['name']))
ValueError: Cannot connect port 'P1_R5' to a process.