CI: fix kokoro failures

[lpawelcz]

Signed-off-by: Pawel Czarnecki [email protected]

Description

I see that kokoro fails in recent CI runs with:

++ pyenv install -f 3.6.3
Downloading Python-3.6.3.tar.xz...
-> https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tar.xz
Installing Python-3.6.3...
Installed Python-3.6.3 to /home/kbuilder/.pyenv/versions/3.6.3

++ pyenv global 3.6.3
++ curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 2548k  100 2548k    0     0  18.8M      0 --:--:-- --:--:-- --:--:-- 18.8M
++ python3 get-pip.py
ERROR: This script does not work on Python 3.6 The minimum supported Python version is 3.7. Please use https://bootstrap.pypa.io/pip/3.6/get-pip.py instead.

As a fix I bumped python version in kokoro script to 3.7.0.

Related Issue

Noticed it after creating PR: #1963

Motivation and Context

How Has This Been Tested?

Types of changes

• Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed