Switch to testr serial instead of nose

This commit removes all usage of nose from tox and run_tests.sh and
migrates over to testr for running tests serially.

Change-Id: I484e02f24d3b30d976860b69d26f3276775deddc
diff --git a/tox.ini b/tox.ini
index c3562e6..53f85c1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,22 +13,11 @@
 commands =
   python setup.py testr --slowest
 
-
 [testenv:full]
 sitepackages = True
 setenv = VIRTUAL_ENV={envdir}
-         NOSE_WITH_OPENSTACK=1
-         NOSE_OPENSTACK_COLOR=1
-         NOSE_OPENSTACK_RED=15
-         NOSE_OPENSTACK_YELLOW=3
-         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/api tempest/scenario tempest/thirdparty tempest/cli
-
-[testenv:testr-serial]
-sitepackages = True
-setenv = VIRTUAL_ENV={envdir}
+# 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
 commands =
   sh tools/pretty_tox_serial.sh '(?!.*\[.*\bslow\b.*\])(^tempest\.(api|scenario|thirdparty|cli)) {posargs}'
 
@@ -41,27 +30,15 @@
 [testenv:smoke]
 sitepackages = True
 setenv = VIRTUAL_ENV={envdir}
-         NOSE_WITH_OPENSTACK=1
-         NOSE_OPENSTACK_COLOR=1
-         NOSE_OPENSTACK_RED=15
-         NOSE_OPENSTACK_YELLOW=3
-         NOSE_OPENSTACK_SHOW_ELAPSED=1
-         NOSE_OPENSTACK_STDOUT=1
 commands =
-   nosetests --logging-format '%(asctime)-15s %(message)s' --with-xunit -sv --attr=type=smoke --xunit-file=nosetests-smoke.xml tempest
+   sh tools/pretty_tox_serial.sh 'smoke {posargs}'
 
 [testenv:coverage]
 sitepackages = True
 setenv = VIRTUAL_ENV={envdir}
-         NOSE_WITH_OPENSTACK=1
-         NOSE_OPENSTACK_COLOR=1
-         NOSE_OPENSTACK_RED=15
-         NOSE_OPENSTACK_YELLOW=3
-         NOSE_OPENSTACK_SHOW_ELAPSED=1
-         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/api tempest/scenario tempest/thirdparty tempest/cli
+   sh tools/pretty_tox_serial.sh '(?!.*\[.*\bslow\b.*\])(^tempest\.(api|scenario|thirdparty|cli)) {posargs}'
    python -m tools/tempest_coverage -c report --html {posargs}
 
 [testenv:stress]