Remove requirements.txt as a dependency (#1111)

* Remove requirements.txt as a dependency

This converts both docker and tox to use poetry, eliminating usage of
requirements.txt in both flows.

- In tox, uses the tox-poetry package which installs dependencies from
  the lockfile.
- In docker, uses
  https://stackoverflow.com/questions/53835198/integrating-python-poetry-with-docker
  as a reference.

* Don't copy pyproject.toml

* Remove obsoleted docs about requirements.txt

* Add --full-trace option to pytest

* Fix liccheck

liccheck works with requirements.txt, not with poetry, so there needs to
be an extra translation step.

* TEMP: Add WIP fix for pandas issue

This is just to see if the github actions would pass once this fix gets
merged, but it's being reviewed separately.

* Revert "TEMP: Add WIP fix for pandas issue"

This reverts commit 06e38e8cc77f5f3105c6e7a9449901db67aa1c82.

data/data-pipeline/tox.ini

@@ -7,32 +7,17 @@ skip_missing_interpreters = true
 
 [testenv:lint]
 # lints python code in src and tests
-deps = -rrequirements.txt
-# These are "external" because they are dev dependencies that not in
-# "requirements.txt" and therefore not installed in this env, but they will be
-# available where this is being run. See:
-# https://stackoverflow.com/questions/47642747/tox-warningtest-command-found-but-not-installed-in-testenv
-allowlist_externals = black
-                      flake8
-                      pylint
 commands = black data_pipeline
            flake8 data_pipeline
-# Ignore tests this lint check because test dependencies are not installed here.
-           pylint data_pipeline --ignore tests
+           pylint data_pipeline
 
 [testenv:checkdeps]
 # checks the dependencies for security vulnerabilities and open source licenses
-deps = -rrequirements.txt
-# These are "external" because they are dev dependencies that not in
-# "requirements.txt" and therefore not installed in this env, but they will be
-# available where this is being run. See:
-# https://stackoverflow.com/questions/47642747/tox-warningtest-command-found-but-not-installed-in-testenv
-allowlist_externals = safety
-                      liccheck
+allowlist_externals = bash
 commands = safety check
-           liccheck
+           bash scripts/run-liccheck.sh
 
 [testenv:pytest]
 # Run tests
 deps = pytest
-commands = pytest
+commands = pytest --full-trace