TST: prepare removal of manual test

unittests/table_json_conversion/test_table_template_generator.py

@@ -187,7 +187,10 @@ def test_template_generator():
     assert ws.row_dimensions[1].hidden is True
     assert ws.column_dimensions['A'].hidden is True
 
+    # TODO: remove the following after manual testing
     di = '/home/professional/CaosDB/management/external/dimr/eingabemaske/crawler/schemas'
+    if not os.path.exists(di):
+        return
     for fi in os.listdir(di):
         rp = os.path.join(di, fi)
         with open(rp) as sfi: