Merge "Use constraints everywhere"

tox.ini

@@ -20,9 +20,6 @@ commands = python setup.py testr --testr-args='{posargs}'
 commands = flake8
 
 [testenv:venv]
-# NOTE(NiallBunting) Infra does not support constraints for the venv
-# job.
-install_command = pip install -U {opts} {packages}
 commands = {posargs}
 
 [pbr]
@@ -35,10 +32,6 @@ setenv =
   OS_TEST_PATH = ./glanceclient/tests/functional
 
 [testenv:cover]
-# NOTE(NiallBunting) Infra does not support constraints for the cover
-# job. While the file is set no file is there. Can be removed once infra
-# changes this.
-install_command = pip install -U {opts} {packages}
 commands = python setup.py testr --coverage --testr-args='{posargs}'
 
 [testenv:docs]
@@ -46,8 +39,6 @@ commands=
     python setup.py build_sphinx
 
 [testenv:releasenotes]
-# NOTE(Niall Bunting) Does not support constraints.
-install_command = pip install -U {opts} {packages}
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [flake8]