Cleanup py27 support

This repo is now testing only with Python 3, so let's make
a few cleanups:
- Remove python 2.7 stanza from setup.py
- Remove obsolete sections from setup.cfg
- Update classifiers
- Remove Babel from requirements, it's not needed for running,
  remove babel.cfg.
- remove obsolete file openstack-common.conf.
- Use TOX_CONSTRAINTS_FILE instead of obsolete UPPER_CONSTRAINTS_FILE.
- Update hacking to current version

Change-Id: I130f1a45151dd45426b99869f40b54361278b5c7

babel.cfg

@@ -1 +0,0 @@
-[python: **.py]

lower-constraints.txt

@@ -1,4 +1,3 @@
-Babel==2.3.4
 coverage==4.5.2
 elasticsearch==2.0.0
 eventlet==0.18.2

openstack-common.conf

@@ -1,7 +0,0 @@
-[DEFAULT]
-
-# The list of modules to copy from oslo-incubator
-module=install_venv_common
-
-# The base module to hold the copy of openstack.common
-base=searchlight

setup.cfg

@@ -14,10 +14,11 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3 :: Only
 
 [entry_points]
 console_scripts =
@@ -59,22 +60,3 @@ searchlight.publisher =
     log_publisher = searchlight.publisher.log:LogPublisher
 wsgi_scripts =
     searchlight-api-wsgi = searchlight.api.wsgi:init_application
-
-[egg_info]
-tag_build =
-tag_date = 0
-tag_svn_revision = 0
-
-[compile_catalog]
-directory = searchlight/locale
-domain = searchlight
-
-[update_catalog]
-domain = searchlight
-output_dir = searchlight/locale
-input_file = searchlight/locale/searchlight.pot
-
-[extract_messages]
-keywords = _ gettext ngettext l_ lazy_gettext
-mapping_file = babel.cfg
-output_file = searchlight/locale/searchlight.pot

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)

test-requirements.txt

@@ -3,10 +3,9 @@
 # process, which may cause wedges in the gate later.
 
 # Hacking already pins down pep8, pyflakes and flake8
-hacking>=3.0.1,<3.1.0 # Apache-2.0
+hacking>=3.1.0,<3.2.0 # Apache-2.0
 
 # For translations processing
-Babel!=2.4.0,>=2.3.4 # BSD
 
 # Needed for testing
 coverage>=4.5.2 # Apache-2.0

tox.ini

@@ -8,7 +8,7 @@ ignore_basepython_conflict = true
 basepython = python3
 setenv = VIRTUAL_ENV={envdir}
 usedevelop = True
-install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt} -U {opts} {packages}
+install_command = pip install -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
@@ -44,14 +44,15 @@ commands =
   oslopolicy-sample-generator --config-file etc/oslo-policy-generator/searchlight.conf
 
 [testenv:docs]
-deps = -r{toxinidir}/doc/requirements.txt
+deps =
+  -r{toxinidir}/doc/requirements.txt
 whitelist_externals = rm
 commands =
   rm -rf doc/build
   sphinx-build -W --keep-going -b html -d doc/build/doctrees doc/source doc/build/html
 
 [testenv:pdf-docs]
-deps = -r{toxinidir}/doc/requirements.txt
+deps = {[testenv:docs]deps}
 envdir = {toxworkdir}/docs
 whitelist_externals =
   make
@@ -60,14 +61,14 @@ commands =
   make -C doc/build/pdf
 
 [testenv:api-ref]
-deps = -r{toxinidir}/doc/requirements.txt
+deps = {[testenv:docs]deps}
 whitelist_externals = rm
 commands =
   rm -rf api-ref/build
   sphinx-build -W --keep-going -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html
 
 [testenv:releasenotes]
-deps = -r{toxinidir}/doc/requirements.txt
+deps = {[testenv:docs]deps}
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html
 
 [testenv:debug]