set_global_data and set_site_data do not support sessions and other classes as the data

[ni-erikcrank]

Using set_global_data with a PXI session reports a run-time error even though documentation for the method indicates that you can use it for sessions. Here's an example:

pxi_session = rm.open_resource('PXI0::1::BACKPLANE')
tsm_context.set_global_data('pxi_session', pxi_session)

Traceback (most recent call last):
  File "C:\Program Files\Python37\lib\site-packages\IPython\core\interactiveshell.py", line 3437, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-15-6440a5af0b4f>", line 1, in <module>
    tsm_context.set_global_data('pxi_session', pxi_session)
  File "c:\users\ysinghal\documents\ni_py_dev\nitsm-python\src\nitsm\tsmcontext.py", line 289, in set_global_data
    return self._context.SetGlobalData(data_id, data)
  File "c:\users\ysinghal\documents\ni_py_dev\nitsm-python\src\nitsm\pinmapinterfaces.py", line 900, in SetGlobalData
    , data)
TypeError: must be real number, not PXIBackplane

Because underlying TSM API is implemented with a COM interface, the TSM SetGlobalData method is limited to COM VARIANT data types. To support arbitrary data types and for best performance, set_global_data should probably store the id() of the data in a global dictionary and pass the id to TSM instead of data itself. Likewise, get_global_data should use the dictionary to find the data from the id obtained from TSM.

A similar problem exists with set_site_data.