Initialize client library from config file and environmental properties (#52)

Author: rolincova

tests/test_WriteApi.py

@@ -470,6 +470,7 @@ def tearDown(self) -> None:
 
     def test_connection_option_from_conf_file(self):
         self.client.close()
+        os.chdir("../tests")
         self.client = InfluxDBClient.from_config_file(os.getcwd() + "/config.ini", self.debug)
 
         self._check_connection_settings()
@@ -490,6 +491,7 @@ def _check_connection_settings(self):
 
     def test_default_tags_from_conf_file(self):
         self.client.close()
+        os.chdir("../tests")
         self.client = InfluxDBClient.from_config_file(os.getcwd() + "/config.ini", self.debug)
 
         self._write_point()