Use os-testr and add PY35 support

python-masakariclient should use os-testr instead of testr as
it is more powerful and provide much prettier output than testr.

This patch also disables the use of PY34 and adds PY35 for in tox
as the gating on python 3.4 is restricted to <= Mitaka in OpenStack.
This is due to the change from Ubuntu Trusty to Xenial, where only
python3.5 is available.

Change-Id: I1029be8dedd8d4530586c2b4b852c7ddc1d03cf7

setup.cfg

@@ -16,8 +16,7 @@ classifier =
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.3
-    Programming Language :: Python :: 3.4
+    Programming Language :: Python :: 3.5
 
 [files]
 packages =

test-requirements.txt

@@ -9,6 +9,7 @@ python-subunit>=0.0.18 # Apache-2.0/BSD
 sphinx>=1.2.1,!=1.3b1,<1.4 # BSD
 oslosphinx>=4.7.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
+os-testr>=0.8.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT

tox.ini

@@ -1,16 +1,38 @@
 [tox]
 minversion = 2.0
-envlist = py34,py27,pypy,pep8
+envlist = py35,py27,pypy,pep8
 skipsdist = True
 
 [testenv]
 usedevelop = True
 install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
-setenv =
-   VIRTUAL_ENV={envdir}
-   PYTHONWARNINGS=default::DeprecationWarning
+setenv = VIRTUAL_ENV={envdir}
+         OS_TEST_PATH=./masakariclient/tests/unit
+         LANGUAGE=en_US
+         LC_ALL=en_US.utf-8
 deps = -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args='{posargs}'
+whitelist_externals = bash
+                      find
+                      rm
+                      env
+# By default ostestr will set concurrency
+# to ncpu, to specify something else use
+# the concurrency=<n> option.
+# call ie: 'tox -epy27 -- --concurrency=4'
+commands =
+  find . -type f -name "*.pyc" -delete
+  rm -Rf .testrepository/times.dbm
+passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY OS_DEBUG GENERATE_HASHES
+
+[testenv:py27]
+commands =
+    {[testenv]commands}
+    ostestr '{posargs}'
+
+[testenv:py35]
+commands =
+    {[testenv]commands}
+    ostestr '{posargs}'
 
 [testenv:pep8]
 commands = flake8 {posargs}