Fix for flatten data for CSV reports

In case of lists or tuples we are joining data into one string.
Joining of non-string types fixed.
Vmware attributes added to tests for installation structure
generation function.

Change-Id: I46b21ae33fd4b50f0d2c5722584248beee8c4f17
Closes-Bug: #1439235

analytics/fuel_analytics/api/resources/utils/export_utils.py

@@ -53,7 +53,7 @@ def get_flatten_data(keys_paths, data):
             if d is None:
                 break
         if isinstance(d, (list, tuple)):
-            flatten_data.append(' '.join(d))
+            flatten_data.append(' '.join(map(six.text_type, d)))
         else:
             flatten_data.append(d)
     return flatten_data

analytics/fuel_analytics/test/api/resources/utils/inst_structure_test.py

@@ -79,6 +79,9 @@ class InstStructureTest(BaseTest):
             'attributes': {
                 'libvirt_type': random.choice(libvirt_names),
                 'heat': random.choice((True, False)),
+            },
+            'vmware_attributes': {
+                'vmware_az_cinder_enable': [True, False],
             }
         }
         network_configuration = self.generate_network_configuration()

analytics/fuel_analytics/test/api/resources/utils/test_stats_to_csv.py

@@ -223,3 +223,11 @@ class StatsToCsvExportTest(InstStructureTest, DbTest):
         flatten_cluster = list(flatten_clusters)[0]
         pos = csv_keys_paths.index(['nodes_platform_name_gt3'])
         self.assertEqual(True, flatten_cluster[pos])
+
+    def test_vmware_attributes(self):
+        exporter = StatsToCsv()
+        inst_structures = self.generate_inst_structures(
+            clusters_num_range=(1, 1))
+        result = exporter.export_clusters(inst_structures, [])
+        for _ in result:
+            pass