Use proper KUBECONFIG file for helmrelease test

test/pytest/test_helmreleases.py

 import pytest
 from kubernetes import client, config
 from kubernetes.client.rest import ApiException
+import os
 
 
 def get_release(name, namespace, api):
@@ -26,7 +27,7 @@ def get_release(name, namespace, api):
 
 
 @pytest.mark.helmreleases
-def test_helmreleases():
+def test_helmreleases(host):
     """Checks if all desired HelmReleases installed by weave flux are in
     DEPLOYED state.
     """
@@ -35,7 +36,10 @@ def test_helmreleases():
         'oas-apps': ['nextcloud']
     }
 
-    config.load_kube_config()
+    cluster_dir = os.path.dirname(os.environ.get("INVENTORY"))
+    kubeconfig = os.path.join(cluster_dir, 'secrets',
+                              'kube_config_cluster.yml')
+    config.load_kube_config(config_file=kubeconfig)
     customObjects = client.CustomObjectsApi()
 
     failed = 0