Bump ansible from 2.7.12 to 2.7.16 (#5739)

Bumps [ansible](https://github.com/ansible/ansible) from 2.7.12 to 2.7.16.
- [Release notes](https://github.com/ansible/ansible/releases)
- [Commits](https://github.com/ansible/ansible/compare/v2.7.12...v2.7.16)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -1,4 +1,4 @@
-ansible==2.7.12
+ansible==2.7.16
 jinja2==2.10.1
 netaddr==0.7.19
 pbr==5.2.0