Build uwsgi in a single thread for testenv's

-  uwsgi build system has race conditions

Related-Prod: PRODX-58214
Change-Id: I33eb2612225804faa1e0deffbe8f502cd08dcd93

Author: vardenbb

Dockerfile

@@ -55,7 +55,6 @@ RUN set -ex; \
     if [[ "${TEST_IMAGE}" == "True" ]]; then \
         OPENSTACK_CONTROLLER_EXTRAS="[test]"; \
     fi; \
-    
     pip wheel --wheel-dir /opt/wheels --find-links /opt/wheels /opt/operator${OPENSTACK_CONTROLLER_EXTRAS}
 
 RUN wget -q -O /usr/local/bin/helm3 ${HELM_BINARY}; \

tox.ini

@@ -19,6 +19,8 @@ allowlist_externals =
 deps =
     .[test]
 setenv =
+    # uwsgi build has race conditions when building in parallel
+    CPUCOUNT=1
     # TODO(vsaienko): figure out why not working with default
     SETUPTOOLS_ENABLE_FEATURES="legacy-editable"
     NODE_IP="127.0.0.1"