chore(ci): bump riot to 0.17.2 [backport #5603 to 1.12] (#5607)

Backport of #5603 to 1.12

A new version of riot has been released which pins virtualenv to
continue to support Python 2.7 venvs.

## Checklist

- [x] Change(s) are motivated and described in the PR description.
- [x] Testing strategy is described if automated tests are not included
in the PR.
- [x] Risk is outlined (performance impact, potential for breakage,
maintainability, etc).
- [x] Change is maintainable (easy to change, telemetry, documentation).
- [x] [Library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/contributing.html#Release-Note-Guidelines)
are followed.
- [x] Documentation is included (in-code, generated user docs, [public
corp docs](https://github.com/DataDog/documentation/)).
- [x] PR description includes explicit acknowledgement/acceptance of the
performance implications of this PR as reported in the benchmarks PR
comment.

## Reviewer Checklist

- [x] Title is accurate.
- [x] No unnecessary changes are introduced.
- [x] Description motivates each change.
- [x] Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes unless absolutely necessary.
- [x] Testing strategy adequately addresses listed risk(s).
- [x] Change is maintainable (easy to change, telemetry, documentation).
- [x] Release note makes sense to a user of the library.
- [x] Reviewer has explicitly acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment.

Author: brettlangdon

.circleci/config.yml

@@ -77,7 +77,7 @@ commands:
     description: "Install riot"
     steps:
       # Make sure we install and run riot on Python 3
-      - run: pip3 install riot==0.17.1
+      - run: pip3 install riot==0.17.2
 
   restore_tox_cache:
     description: "Restore .tox directory from previous runs for faster installs"

scripts/ddtest

@@ -12,7 +12,7 @@ fi
 # retry docker pull if fails
 for i in {1..3}; do docker-compose pull -q testrunner && break || sleep 3; done
 
-FULL_CMD="pip install -q --disable-pip-version-check riot==0.17.1 tox && $CMD"
+FULL_CMD="pip install -q --disable-pip-version-check riot==0.17.2 tox && $CMD"
 
 # install and upgrade tox and riot in case testrunner image has not been updated
 # DEV: Use `--no-TTY` and `--quiet-pull` when running in CircleCI