Don't install kafka-python

This should have been removed when we switched oslo.messaging to
confluent-kafka way back in the victoria cycle [1].

We also update tox to update whitelist_externals to allowlist_externals.

[1] Idfb9fe3700d882c8285c6dc56b0620951178eba2

Change-Id: I3d87e4bb5775aa549ccf3c8266c4161c2dc4a110
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

devstack/plugin.sh

@@ -89,8 +89,6 @@ function _download_kafka {
 # driver
 function _install_kafka_python {
     # Install kafka client API
-    # TODO(ansmith) remove kafka-python library following switch
-    pip_install_gr kafka-python
     pip_install_gr confluent-kafka
 }
 

tox.ini

@@ -8,9 +8,8 @@ usedevelop = False
 install_command = pip install {opts} {packages}
 
 [testenv:bashate]
-basepython = python3
 deps = bashate
-whitelist_externals = bash
+allowlist_externals = bash
 commands = bash -c "find {toxinidir}          \
          -not \( -type d -name .?\* -prune \) \
          -not \( -type d -name doc -prune \)  \