collapse tox.ini test commands for readability

instead of specifying the test runs on seperate lines, just make
them a series of args on a single line.

Part of bp:tempest-repo-restructure

Change-Id: I1250c1ba6e2e8edf38bb32abb450cd3ce03c1dd3
diff --git a/tox.ini b/tox.ini
index 6de8825..7d3d245 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,8 +20,7 @@
          NOSE_OPENSTACK_SHOW_ELAPSED=1
          NOSE_OPENSTACK_STDOUT=1
 commands =
-  nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit --xunit-file=nosetests-full.xml -sv tempest/tests
-  nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit --xunit-file=nosetests-cli.xml -sv tempest/cli
+  nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit --xunit-file=nosetests-full.xml -sv tempest/tests tempest/cli
 
 [testenv:smoke]
 sitepackages = True
@@ -47,8 +46,7 @@
          NOSE_OPENSTACK_STDOUT=1
 commands =
    python -m tools/tempest_coverage -c start --combine
-   nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit --xunit-file=nosetests-full.xml -sv tempest/tests
-   nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit --xunit-file=nosetests-cli.xml -sv tempest/cli
+   nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit --xunit-file=nosetests-full.xml -sv tempest/tests tempest/cli
    python -m tools/tempest_coverage -c report --html
 
 [testenv:pep8]