use dynamically generated port number to configure servers in unittest

test/run.py

@@ -34,6 +34,10 @@ if osName == 'Linux':
 
 sanitizerFlags = sanitizersFlags[sanitizer]
 
+# if osName == 'Windows':
+#     os.environ['CC'] = 'clang-cl'
+#     os.environ['CXX'] = 'clang-cl'
+
 cmakeCmd = 'cmake -DCMAKE_BUILD_TYPE=Debug {} {} ..'.format(generator, sanitizerFlags)
 print(cmakeCmd)
 ret = os.system(cmakeCmd)