Latest repodata.json causes issues with pip / libffi.so.6

[SSchott]

Current Behavior

Under OpenSuse 42.3, latest Miniconda fails to update properly, causing:

`The following packages will be REMOVED:

pip-19.3.1-py27_0
wheel-0.33.6-py27_0`

And at the end:
ImportError: libffi.so.6: cannot open shared object file: No such file or directory

Steps to Reproduce

./Miniconda2-latest-Linux-x86_64.sh
......
./conda update conda -y
./conda install pip

Expected Behavior

This happens after the latest change in repodata.json. I guess there is the problem. It worked before last Thursday 23.04.2020

[kalefranz]

CC @mingwandroid

[ruanimal]

same issues with miniconda

[ruanimal]

use base env can bypass this problem. And virtualenv can be used as an alternative to conda env.

[github-actions]

Hi there, thank you for your contribution!

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