Some Cleanups

This repo is now Python 3, update:
- Remove python 2.7 stanza from setup.py
- Remove install_command from tox.ini, the default is fine
- Remove Babel from requirements, it's not needed for running.
- Use TOX_CONSTRAINTS_FILE instead of obsolete UPPER_CONSTRAINTS_FILE.
- Use py36 for fault test

Change-Id: Ia23841a4899361178994e349e1323de857b4ee23

.zuul.yaml

@@ -1,6 +1,6 @@
 - job:
     name: castellan-functional-vault
-    parent: openstack-tox-py27
+    parent: openstack-tox-py36
     description: |
       Run tox functional-vault target
     required-projects:

lower-constraints.txt

@@ -1,6 +1,5 @@
 appdirs==1.3.0
 asn1crypto==0.23.0
-Babel==2.3.4
 certifi==2020.4.5.2
 cffi==1.13.2
 chardet==3.0.4

requirements.txt

@@ -3,7 +3,6 @@
 # process, which may cause wedges in the gate later.
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-Babel!=2.4.0,>=2.3.4 # BSD
 cryptography>=2.1 # BSD/Apache-2.0
 python-barbicanclient>=4.5.2 # Apache-2.0
 oslo.config>=6.4.0 # Apache-2.0

setup.py

@@ -13,17 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
-# In python < 2.7.4, a lazy loading of package `pbr` will break
-# setuptools if some other modules registered functions in `atexit`.
-# solution from: http://bugs.python.org/issue15881#msg170215
-try:
-    import multiprocessing  # noqa
-except ImportError:
-    pass
-
 setuptools.setup(
     setup_requires=['pbr>=2.0.0'],
     pbr=True)

tox.ini

@@ -11,7 +11,7 @@ setenv =
    VIRTUAL_ENV={envdir}
    OS_TEST_PATH=./castellan/tests/unit
 deps =
-       -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
+       -c{env:TOX_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = stestr run --slowest {posargs}
@@ -78,7 +78,6 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 
 [testenv:functional]
 usedevelop = True
-install_command = pip install -U {opts} {packages}
 setenv =
     VIRTUAL_ENV={envdir}
     OS_TEST_PATH=./castellan/tests/functional
@@ -87,7 +86,6 @@ commands = stestr run --slowest {posargs}
 [testenv:functional-vault]
 passenv = HOME
 usedevelop = True
-install_command = pip install -U {opts} {packages}
 setenv =
     VIRTUAL_ENV={envdir}
     OS_TEST_PATH=./castellan/tests/functional