Drop lower-constraints.txt and its testingstable/ussuri

As discussed in TC PTG[1] and TC resolution[2], we are
dropping the lower-constraints.txt file and its testing.
We will keep lower bounds in the requirements.txt file but
with a note that these are not tested lower bounds and we
try our best to keep them updated.

[1] https://etherpad.opendev.org/p/tc-zed-ptg#L326
[2] https://governance.openstack.org/tc/resolutions/20220414-drop-lower-constraints.html#proposal

(cherry picked from commit 0475709c0734d8314637298de2fd2b005ad5a1cb)

Change-Id: Ia3f66b6805704c254295fd663f0260d5d963ed66

6 files changed, 9 insertions, 67 deletions

diff --git a/.zuul.yaml b/.zuul.yaml
index f5d806c..ef0bb9c 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -3,6 +3,5 @@
       - check-requirements
       - lib-forward-testing-python3
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-ussuri-jobs
       - publish-openstack-docs-pti
diff --git a/lower-constraints.txt b/lower-constraints.txt
deleted file mode 100644
index 10d033e..0000000
--- a/lower-constraints.txt
+++ /dev/null
@@ -1,56 +0,0 @@
-alabaster==0.7.10
-appdirs==1.3.0
-Babel==2.3.4
-coverage==4.0
-debtcollector==1.2.0
-docutils==0.11
-dulwich==0.15.0
-extras==1.0.0
-fixtures==3.0.0
-flake8==2.2.4
-flake8-docstrings==0.2.1.post1
-hacking==0.10.3
-imagesize==0.7.1
-iso8601==0.1.11
-Jinja2==2.10
-keystoneauth1==3.4.0
-linecache2==1.0.0
-MarkupSafe==1.0
-mccabe==0.2.1
-mock==2.0.0
-monotonic==0.6
-mox3==0.20.0
-msgpack-python==0.4.0
-netaddr==0.7.18
-netifaces==0.10.4
-openstackdocstheme==1.20.0
-os-client-config==1.28.0
-oslo.config==5.2.0
-oslo.i18n==3.15.3
-oslo.serialization==2.18.0
-oslo.utils==3.33.0
-oslotest==3.2.0
-pbr==2.0.0
-pep257==0.7.0
-pep8==1.5.7
-pyflakes==0.8.1
-Pygments==2.2.0
-pyparsing==2.1.0
-python-mimeparse==1.6.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.12
-requests==2.14.2
-requestsexceptions==1.2.0
-rfc3986==0.3.1
-six==1.10.0
-snowballstemmer==1.2.1
-Sphinx==1.6.2
-sphinxcontrib-apidoc===0.2.0
-sphinxcontrib-websupport==1.0.1
-stevedore==1.20.0
-stestr==2.0.0
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-wrapt==1.7.0
diff --git a/requirements.txt b/requirements.txt
index cf26f75..78604d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,7 @@
+# Requirements lower bounds listed here are our best effort to keep them up to
+# date but we do not test them so no guarantee of having them all correct. If
+# you find any incorrect lower bounds, let us know or propose a fix.
+
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
diff --git a/setup.cfg b/setup.cfg
index 054bc39..baa90f7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,13 +8,14 @@ description-file =
 home-page = https://docs.openstack.org/pycadf/latest/
 python-requires = >=3.6
 classifier =
-    Development Status :: 3 - Alpha
+    Development Status :: 5 - Production/Stable
     Environment :: OpenStack
     Intended Audience :: Developers
     Intended Audience :: Information Technology
     License :: OSI Approved :: Apache Software License
-    Operating System :: OS Independent
+    Operating System :: POSIX :: Linux
     Programming Language :: Python
+    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
diff --git a/setup.py b/setup.py
index 566d844..74c3ac9 100644
--- a/setup.py
+++ b/setup.py
@@ -25,5 +25,5 @@ except ImportError:
     pass
 
 setuptools.setup(
-    setup_requires=['pbr>=2.0.0'],
+    setup_requires=['pbr>=5.9.0'],
     pbr=True)
diff --git a/tox.ini b/tox.ini
index 7f2ef4f..ec5aa03 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,7 @@ ignore_basepython_conflict = True
 [testenv]
 basepython = python3
 deps =
- -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+ -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/ussuri}
  -r{toxinidir}/test-requirements.txt
  -r{toxinidir}/requirements.txt
 commands = stestr run --slowest {posargs}
@@ -56,9 +56,3 @@ show-source = True
 # D401: First line should be in imperative mood
 ignore = H405,D100,D101,D102,D103,D104,D105,D200,D202,D203,D204,D205,D208,D400,D401
 exclude = .tox,dist,doc,*.egg,build
-
-[testenv:lower-constraints]
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt