[rp-reporter] Add tox

Related-Prod: PRODX-53429
Change-Id: I6dde28fe699211a6a193fdeff1e956be2b9a21db
diff --git a/rp_reporter/setup.cfg b/rp_reporter/setup.cfg
index 4ad511c..1d0da97 100644
--- a/rp_reporter/setup.cfg
+++ b/rp_reporter/setup.cfg
@@ -1,19 +1,10 @@
 [metadata]
 name = rp-reporter
 summary = Reporting test results to the Report Portal
-description-file = README.md
+description_file = README.md
 license = Apache Software License
-classifiers =
-    Programming Language :: Python
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.9
-    Environment :: OpenStack
-    Intended Audience :: Information Technology
-    Intended Audience :: System Administrators
-    License :: OSI Approved :: Apache Software License
-    Operating System :: POSIX :: Linux
 author = mirantis
-author-email = harhipova@mirantis.com
+author_email = harhipova@mirantis.com
 [global]
 setup-hooks = pbr.hooks.setup_hook
 [files]
@@ -25,3 +16,8 @@
     PyYAML
     wget
     jenkins-jinny @ git+https://github.com/annkapul/jenkins-jinny.git
+
+[extras]
+test =
+    flake8<3.8
+    black