feat: add requirements_freeze.txt file to help lock down a working environment

[dmuldrew]

Purpose

The requirements_freeze.txt provides a complete list of installed package versions and dependencies of a known working environment. This provides a reference to revert to if the requirements.txt file generates an unusable environment in the future. Additional discussion can be found in the closed PR here:
#147

What is the code doing

In order to standardize the environment that the freeze file is generates in, I used a Python:3.65 docker image found here:
https://hub.docker.com/_/python
I didn't see much in the way of extra packages compared to conda.

The code used to automatically generate this file is within this branch:
https://github.com/intvenlab/PowerSimData/compare/dependency_docker_generation

Time to review

30min

[rouille]

I have the same list of packages along with the same version:

Package            Version
------------------ -------
asn1crypto         1.3.0  
atomicwrites       1.3.0  
attrs              19.3.0 
bcrypt             3.1.7  
cffi               1.14.0 
cryptography       2.4.2  
geographiclib      1.50   
geopy              1.20.0 
idna               2.9    
importlib-metadata 1.6.0  
jsonpickle         1.2    
more-itertools     8.2.0  
numpy              1.16.0 
pandas             0.25.3 
paramiko           2.4.2  
pip                20.0.2 
pipdeptree         0.13.2 
pluggy             0.13.1 
py                 1.8.1  
pyasn1             0.4.8  
pycparser          2.20   
PyNaCl             1.3.0  
pytest             4.5.0  
python-dateutil    2.8.1  
pytz               2019.3 
scipy              1.2.0  
setuptools         39.0.1 
six                1.14.0 
tqdm               4.29.1 
wcwidth            0.1.9  
zipp               3.1.0  

I have pip, pipdeptree and setuptools too. I agree that these should not be in the freeze. You do have powersimdata==0.3. Do we need to list it in its own package? What do you think @kasparm. Also, currently PowerSimData import modules in PreREISE and PostREISE. I will submit some PRs tonight that remove these dependencies. Perhaps, you should wait that these PRs go in so you don't have to list these dependencies in the requirements.

[kasparm]

@rouille the package itself should not be part of the requirements.

[rouille]

@dmuldrew can you then remove powersimdata==0.3 from the list.

[kasparm]

Looks good.