Add check-requirements to project template

This patch adds a job to check the requirements in the gate.
To pass the test, this patch includes several fixes:

* Revert following commits:
    - https://review.opendev.org/#/c/671249
      (baaaff17b5)
* Add missing packages in lower-constraints.txt
    - osprofiler
    - setuptools
* Adjust psycopg2 version in test-requirements.txt
  to that in lower-constraints.txt.
  This has been bumped in:
    - https://review.opendev.org/#/c/614559/.
      (4469a813cb)

Change-Id: Ib9942a8310a74bf48a2b05a78a4971cba87d7689
Depends-On: https://review.opendev.org/#/c/698960
Story: #2007023
Task: #37813

.zuul.yaml

@@ -6,11 +6,12 @@
       # tempest-integrated-placement and grenade-py3 jobs.
       # tempest-integrated-placement runs a subset of tempest tests which are
       # relevant for placement, e.g. it does not run keystone tests.
+      - check-requirements
       - integrated-gate-placement
-      - publish-openstack-docs-pti
       - openstack-cover-jobs
       - openstack-lower-constraints-jobs
       - openstack-python3-ussuri-jobs
+      - publish-openstack-docs-pti
       - release-notes-jobs-python3
     check:
       jobs:

lower-constraints.txt

@@ -50,6 +50,7 @@ oslo.serialization==2.18.0
 oslo.upgradecheck==0.2.0
 oslo.utils==3.37.0
 oslotest==3.4.0
+osprofiler==1.4.0
 pbr==2.0.0
 pep8==1.5.7
 pluggy==0.6.0
@@ -77,6 +78,7 @@ Routes==2.3.1
 six==1.10.0
 smmap2==2.0.3
 SQLAlchemy==1.2.19
+setuptools==21.0.0
 sqlparse==0.2.4
 statsd==3.2.2
 stestr==1.0.0

test-requirements.txt

@@ -6,8 +6,12 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0.0 # BSD
-psycopg2>=2.6.2; sys_platform!='darwin' # LGPL/ZPL
-PyMySQL>=0.7.6; sys_platform!='darwin' # MIT License
+# NOTE(tetsuro): Local testing on osx may have problems to install packages,
+# psycopg2 and PYMySQL. You can workaround them using sys_platform qualifier.
+# See the https://review.opendev.org/#/c/671249/ for details. However, we
+# don't use it here to keep the consistency with global requirements.
+psycopg2>=2.7 # LGPL/ZPL
+PyMySQL>=0.7.6 # MIT License
 oslotest>=3.4.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT