Fix gate

Depends-On: https://review.opendev.org/c/openstack/openstack-zuul-jobs/+/881890
Change-Id: I9ebf7457e0fc0c98711ba1b093b0f1b8a9f25dff

test-requirements.txt

@@ -3,5 +3,6 @@
 # process, which may cause wedges in the gate later.
 
 coverage
+attrs<22; python_version<"3.5"
 pytest
 six>=1.9.0

test/run_core_tests_manual.py

@@ -67,7 +67,7 @@ class CoreTests():
                     (pythonpath, test_cmd_prefix, test, cur_dir,
                      log_filename_prefix, test))
 
-                assert(0 == ret)
+                assert (0 == ret)
                 os.system("rm -f *.pyc")
                 os.chdir(cur_dir)
                 print('ok')

tox.ini

@@ -11,6 +11,8 @@ setenv = LIBERASURECODE_DIR={envdir}/liberasurecode
     JERASURE_DIR={envdir}/jerasure
     GFCOMPLETE_DIR={envdir}/gf-complete
 passenv = LIBERASURECODE_REF
+allowlist_externals =
+    compilelibs: {toxinidir}/tools/pip-install-with-liberasurecode.sh
 install_command =
     compilelibs: {toxinidir}/tools/pip-install-with-liberasurecode.sh {opts} {packages}
     !compilelibs: pip install {opts} {packages}