Remove more leftover OpenStack references (#1195)

The tox.ini still had some test environments specifically for
testing within OpenStack. This is no longer needed. Also no
longer necessary is stestr configuration that used OpenStack
variables.

Signed-off-by: Eric Brown <[email protected]>

.stestr.conf

@@ -1,4 +1,4 @@
 [DEFAULT]
-test_path=${OS_TEST_PATH:-./tests}
+test_path=./tests
 top_dir=./
-group_regex=.*(test_cert_setup)
+parallel_class=True

tox.ini

@@ -28,9 +28,6 @@ passenv =
     no_proxy
     NO_PROXY
 
-[testenv:debug]
-commands = oslo_debug_helper -t tests {posargs}
-
 [testenv:linters]
 deps = {[testenv:pep8]deps}
 usedevelop = False
@@ -87,20 +84,3 @@ deps =
     pre-commit
 commands =
     pre-commit run --all-files --show-diff-on-failure
-
-[testenv:lower-constraints]
-basepython = python3
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
-
-# This environment can be used to quickly validate that all needed system
-# packages required to successfully execute test targets are installed
-[testenv:bindep]
-# Do not install any requirements. We want this to be fast and work even if
-# system dependencies are missing, since it's used to tell you what system
-# dependencies are missing! This also means that bindep must be installed
-# separately, outside of the requirements files.
-deps = bindep
-commands = bindep test