Fix typo in tox.ini

This commit fixes typos in tox.ini.

Change-Id: I990b5e3d713de5a19300f4ae7ead66d75a423429
diff --git a/tox.ini b/tox.ini
index 892cfed..ecd4f24 100644
--- a/tox.ini
+++ b/tox.ini
@@ -55,7 +55,7 @@
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # The regex below is used to select which tests to run and exclude the slow tag:
-# See the testrepostiory bug: https://bugs.launchpad.net/testrepository/+bug/1208610
+# See the testrepository bug: https://bugs.launchpad.net/testrepository/+bug/1208610
 commands =
   find . -type f -name "*.pyc" -delete
   bash tools/pretty_tox.sh '(?!.*\[.*\bslow\b.*\])(^tempest\.(api|scenario|thirdparty)) {posargs}'
@@ -65,7 +65,7 @@
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # The regex below is used to select which tests to run and exclude the slow tag:
-# See the testrepostiory bug: https://bugs.launchpad.net/testrepository/+bug/1208610
+# See the testrepository bug: https://bugs.launchpad.net/testrepository/+bug/1208610
 commands =
   find . -type f -name "*.pyc" -delete
   bash tools/pretty_tox_serial.sh '(?!.*\[.*\bslow\b.*\])(^tempest\.(api|scenario|thirdparty)) {posargs}'