Get rid of nose

nose hasn't been updated for 9 years and is dead.

Change-Id: I3c794c063e7f847a38c4592f8f04f22ec706b957

devstack/plugin.sh

@@ -126,21 +126,6 @@ function init_mistral {
 function install_mistral {
     setup_develop $MISTRAL_DIR
 
-    # installing python-nose.
-    if is_fedora; then
-        if python3_enabled; then
-            real_install_package python3-nose
-        else
-            real_install_package python2-nose
-        fi
-    elif is_ubuntu; then
-        if python3_enabled; then
-            real_install_package python3-nose
-        fi
-    else
-        real_install_package python-nose
-    fi
-
     if is_service_enabled horizon; then
         _install_mistraldashboard
     fi

doc/source/contributor/debugging_and_testing.rst

@@ -129,19 +129,11 @@ python-mistralclient:
 
 To run integration tests:
 
-* in OpenStack mode (when auth in Mistral is enabled and Mistral integrates
-  with OpenStack components)
-
 .. code-block:: bash
 
     $ pip install git+http://git.opendev.org/openstack/tempest.git
-    $ nosetests mistral-tempest-plugin/mistral_tempest_tests/tests/api/v2
-
-* in Non-OpenStack mode:
-
-  * set 'auth_enable=false' in the mistral.conf under [pecan] group
-  * restart Mistral server
-  * execute: ./run_functional_tests
+    $ pip install git+http://git.opendev.org/openstack/mistral-tempest-plugin.git
+    $ tempest run -- mistral_tempest_plugin.mistral_tempest_tests.api.v2
 
 Mistral-Dashboard debug instructions
 ====================================

test-requirements.txt

@@ -4,7 +4,6 @@ coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.8.1 # Apache-2.0
 Pygments>=2.2.0 # BSD license
 fixtures>=3.0.0 # Apache-2.0/BSD
-nose>=1.3.7 # LGPL
 oslotest>=3.2.0 # Apache-2.0
 requests-mock>=1.2.0 # Apache-2.0
 tempest>=21.0.0 # Apache-2.0