odahu-flow-connections-resources-uploader fails with pkg_resources.ContextualVersionConflict

[karbyshevds]

Describe the bug
odahu-flow-connections-resources-uploader built from current develop (01d4c30) fails with log below:

Traceback (most recent call last):
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 578, in _build_master
    ws.require(__requires__)
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 895, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 786, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (urllib3 1.26.0 (/opt/conda/lib/python3.7/site-packages), Requirement.parse('urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1'), {'requests'})

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/conda/bin/odahuflowctl", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3105, in <module>
    @_call_aside
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3089, in _call_aside
    f(*args, **kwargs)
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3118, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 580, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 593, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/opt/conda/lib/python3.7/site-packages/pkg_resources/__init__.py", line 786, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (urllib3 1.26.0 (/opt/conda/lib/python3.7/site-packages), Requirement.parse('urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1'), {'requests'})

To Reproduce
Steps to reproduce the behavior:

1. Build from current develop (01d4c30)
2. Try to deploy odahuflow via helm
3. See that odahu-flow-connections-resources-uploader` fails with above error.

Expected behavior
success deployment of ODAHU

Actual behavior
ODAHU delopyment fails

[vlad-tokarev]

This is a problem of the requests library that limits urillib3 < 1.26 in its dependencies, but urllib3 1.26 was released yesterday. Tomorrow release of requests will fix this issue

We have both dependencies for odahu-flow-sdk
requests>=2.22.0
urllib3>=1.24.3

But unfortunately, it's not the right way to limit some of our dependencies by setting the upper bound of the version.
Because odahu-flow-sdk is not an end application but the library too. So if we fix some version we create the same problems for our users as the requests library did.

BTW new PIP resolver will be released soon and pip will be able to downgrade your installed packages to fit the full list of requirements. But for now, it is activating by --use-feature=2020-resolver

Anyway, this problem does not affect already built images with CLI

[vlad-tokarev]

I created an issue for reproducible Docker image builds
#427