do not re-create genepath if already exists

test/test_functional/test_align.py

@@ -34,7 +34,8 @@ def setup_teardown_module():
     - remove all log files
     - remove directory with generated results
     """
-    os.mkdir(GENEPATH)
+    if not os.path.isdir(GENEPATH):
+        os.mkdir(GENEPATH)
     print("setup")
 
     yield