commit 5a3ac7eea0cb61af8e0d25419b174ead0a6a73ac
author Deven Desai <deven.desai.amd@gmail.com> Mon Jan 25 11:21:47 2021 -0800
committer Deven Desai <deven.desai.amd@gmail.com> Tue Jan 26 05:56:47 2021 -0800
tree 2137c83c6c5d40b50f3bb47d602826a13f87d5c8
parent 4838793e120ff3a08a3c47b969ec21320f2a17ed

[ROCm] Update script install_pip_packages.sh for Python 2.7

Currently ROCm TF cotnainers use the `install_pip_packages.sh` script to install the Python pip package-manager.
* https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/ci_build/Dockerfile.rocm#L102
* https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/ci_build/install/install_pip_packages.sh#L20-L23

Starting 01/23/2021, we started getting the following error while building TF containers for ROCM CI (when calling `get-pip.py` for Python2)

```
Traceback (most recent call last):
  File "get-pip.py", line 24226, in <module>
    main()
  File "get-pip.py", line 199, in main
    bootstrap(tmpdir=tmpdir)
  File "get-pip.py", line 82, in bootstrap
    from pip._internal.cli.main import main as pip_entry_point
  File "/tmp/tmpWkL0gn/pip.zip/pip/_internal/cli/main.py", line 60
    sys.stderr.write(f"ERROR: {exc}")
```

The cause seems to be an update to the `get-pip.py` script, which now picks the version `pip-21.0` (previously it was `pip-20.3.4`).
`pip-21.0` drops support for Python2.7 (as indicated by the following warning message)
```
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020.
Please upgrade your Python as Python 2.7 is no longer maintained.
pip 21.0 will drop support for Python 2.7 in January 2021.
More details about Python 2 support in pip can be found at
https://pip.pypa.io/en/latest/development/release-process/#python-2-support
pip 21.0 will remove support for this functionality.
```

It seems that there is now a Python 2.7 specific version of the `get-pip.py` script that we need to use, and that is what this commit does