requirements-check job fails

requirements-check job will always fail with current Nova doc requirements:

2019-05-14 15:14:03.375075 | TASK [Run requirements check script]
2019-05-14 15:14:15.756135 | ubuntu-bionic | sys.version_info(major=3, minor=6, micro=7, releaselevel='final', serial=0)
2019-05-14 15:14:15.756335 | ubuntu-bionic | selecting default requirements directory for normal mode
2019-05-14 15:14:15.756388 | ubuntu-bionic | Branch: master
2019-05-14 15:14:15.756464 | ubuntu-bionic | Source: src/opendev.org/openstack/nova
2019-05-14 15:14:15.756573 | ubuntu-bionic | Requirements: /home/zuul/src/opendev.org/openstack/requirements
2019-05-14 15:14:15.756631 | ubuntu-bionic | git log -n 1 --format=%H
2019-05-14 15:14:15.756735 | ubuntu-bionic | Patch under test: b'f029534938012a19e4eee2d0927f4ccb2747b8fe'
2019-05-14 15:14:15.756870 | ubuntu-bionic | git --git-dir /home/zuul/src/opendev.org/openstack/requirements/.git rev-parse HEAD
2019-05-14 15:14:15.756988 | ubuntu-bionic | requirements git sha: b'85f9aad798323c5f6dd8ce1a3dd5e009c2f944a1'
2019-05-14 15:14:15.757056 | ubuntu-bionic | virtualenv /tmp/tmp62m_7g3d/venv
2019-05-14 15:14:15.757192 | ubuntu-bionic | /tmp/tmp62m_7g3d/venv/bin/pip install /home/zuul/src/opendev.org/openstack/requirements
2019-05-14 15:14:15.757289 | ubuntu-bionic | Checking b'f029534938012a19e4eee2d0927f4ccb2747b8fe'
2019-05-14 15:14:15.757350 | ubuntu-bionic | Processing requirements.txt
2019-05-14 15:14:15.757417 | ubuntu-bionic | Processing test-requirements.txt
2019-05-14 15:14:15.757482 | ubuntu-bionic | Processing doc/requirements.txt
2019-05-14 15:14:15.757539 | ubuntu-bionic | Processing .[osprofiler]
2019-05-14 15:14:15.757603 | ubuntu-bionic | Validating requirements.txt
2019-05-14 15:14:15.757671 | ubuntu-bionic | Validating test-requirements.txt
2019-05-14 15:14:15.757736 | ubuntu-bionic | Validating doc/requirements.txt
2019-05-14 15:14:15.757999 | ubuntu-bionic | Requirement(package='sphinx', location='', specifiers='!=1.6.6,!=1.6.7,>=1.6.2', markers='', comment='# BSD', extras=frozenset()) 'markers': '' does not match "python_version=='2.7'"
2019-05-14 15:14:15.758262 | ubuntu-bionic | Requirement(package='sphinx', location='', specifiers='!=1.6.6,!=1.6.7,>=1.6.2', markers='', comment='# BSD', extras=frozenset()) 'markers': '' does not match "python_version>='3.4'"
2019-05-14 15:14:15.758537 | ubuntu-bionic | Could not find a global requirements entry to match package sphinx. If the package is already included in the global list, the name or platform markers there may not match the local settings.
2019-05-14 15:14:15.758596 | ubuntu-bionic | Validating osprofiler
2019-05-14 15:14:15.758684 | ubuntu-bionic | Validating lower constraints of requirements.txt
2019-05-14 15:14:15.758777 | ubuntu-bionic | Validating lower constraints of test-requirements.txt
2019-05-14 15:14:15.758865 | ubuntu-bionic | Validating lower constraints of osprofiler
2019-05-14 15:14:15.758938 | ubuntu-bionic | *** Incompatible requirement found!
2019-05-14 15:14:15.759063 | ubuntu-bionic | *** See https://docs.openstack.org/requirements/latest/
2019-05-14 15:14:16.085404 | ubuntu-bionic | ERROR
2019-05-14 15:14:16.085856 | ubuntu-bionic | {
2019-05-14 15:14:16.085977 | ubuntu-bionic | "delta": "0:00:11.176407",
2019-05-14 15:14:16.086084 | ubuntu-bionic | "end": "2019-05-14 15:14:15.781517",
2019-05-14 15:14:16.086187 | ubuntu-bionic | "msg": "non-zero return code",
2019-05-14 15:14:16.086288 | ubuntu-bionic | "rc": 1,
2019-05-14 15:14:16.086391 | ubuntu-bionic | "start": "2019-05-14 15:14:04.605110"
2019-05-14 15:14:16.086490 | ubuntu-bionic | }
2019-05-14 15:14:16.170292 |