Bump ansible-core from 2.14.0 to 2.15.9 in /tests/integration

Bumps [ansible-core](https://github.com/ansible/ansible) from 2.14.0 to 2.15.9.
- [Release notes](https://github.com/ansible/ansible/releases)
- [Commits](ansible/ansible@v2.14.0...v2.15.9)

---
updated-dependencies:
- dependency-name: ansible-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

tests/integration/requirements.txt

@@ -1,7 +1,7 @@
 pip~=21.3.1
 ipaddress~=1.0.23
 setuptools~=44.1.1
-ansible-core==2.14.0
+ansible-core==2.15.9
 requests~=2.26.0
 black==21.7b0
 flake8==4.0.1