Fixes the several problems/errors caused by tox

Change-Id: Ia9665f075bbd55a078be1b95da1c535707985877

test-requirements.txt

@@ -14,3 +14,4 @@ stestr>=1.0.0 # Apache-2.0
 pylint==1.4.5 # GPLv2
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.4.0 # MIT
+sahara>=10.0.0.0b1

tox.ini

@@ -18,7 +18,10 @@ deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
 commands = stestr run {posargs}
-passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
+passenv =
+    http_proxy
+    https_proxy
+    no_proxy
 
 [testenv:debug-py36]
 basepython = python3.6
@@ -50,6 +53,8 @@ commands =
     sphinx-build -W -b html doc/source doc/build/html
 whitelist_externals =
     rm
+allowlist_externals =
+    rm
 
 [testenv:pdf-docs]
 deps = {[testenv:docs]deps}
@@ -60,6 +65,9 @@ commands =
 whitelist_externals =
     make
     rm
+allowlist_externals =
+    make
+    rm
 
 [testenv:releasenotes]
 deps =
@@ -69,6 +77,7 @@ commands =
   rm -rf releasenotes/build releasenotes/html
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 whitelist_externals = rm
+allowlist_externals = rm
 
 [testenv:debug]
 # It runs tests from the specified dir (default is sahara_plugin_spark/tests)