Added image path in image_query method as a enhancement

[in-manishkr]

What this PR does ?

image_query method provides information about a single or multiple images at once. But does not provide information of where this image is stored.

This PR adds path where the image is stored in zvmsdk to enhance the information shared by zvmsdk.

Apart from that this PR also includes small code optimization in the image_query method which helped in reducing code lines without impacting the actual working

[Bischoff]

What about modifying this unit test?

   @mock.patch.object(smtclient.SMTClient, '_get_image_last_access_time')
    @mock.patch.object(database.ImageDbOperator, 'image_query_record')
    def test_image_query(self, image_query, access_time):
        image_name = "testimage"
        fake_access_time = 1581910539.3330014
        access_time.return_value = fake_access_time
        image_query.return_value = [{'imagename': 'testimage'}]
        image_info = self._smtclient.image_query(image_name)
        image_query.assert_called_once_with(image_name)
        self.assertEqual(image_info[0]['last_access_time'],
                         fake_access_time)

in zvmsdk/tests/unit/test_smtclient.py

[in-manishkr]

What about modifying this unit test?

   @mock.patch.object(smtclient.SMTClient, '_get_image_last_access_time')
    @mock.patch.object(database.ImageDbOperator, 'image_query_record')
    def test_image_query(self, image_query, access_time):
        image_name = "testimage"
        fake_access_time = 1581910539.3330014
        access_time.return_value = fake_access_time
        image_query.return_value = [{'imagename': 'testimage'}]
        image_info = self._smtclient.image_query(image_name)
        image_query.assert_called_once_with(image_name)
        self.assertEqual(image_info[0]['last_access_time'],
                         fake_access_time)

in zvmsdk/tests/unit/test_smtclient.py

@Bischoff

As requested, I have updated the test cases to cover image_path . Please re-review and let me know if we need further enhancements