Regression fixes (linode#636)

* Fix of: test_cluster_create_with_api_objects

* Revert changes in lke.py, pass [node_pools] to cluster_create in int test instead

* Rename node_pools to node_pool as it is single element

Author: mawilk90

test/integration/linode_client/test_linode_client.py

@@ -328,10 +328,10 @@ def test_cluster_create_with_api_objects(test_linode_client):
     node_type = client.linode.types()[1]  # g6-standard-1
     version = client.lke.versions()[0]
     region = get_region(client, {"Kubernetes"})
-    node_pools = client.lke.node_pool(node_type, 3)
+    node_pool = client.lke.node_pool(node_type, 3)
     label = get_test_label()
 
-    cluster = client.lke.cluster_create(region, label, node_pools, version)
+    cluster = client.lke.cluster_create(region, label, version, [node_pool])
 
     assert cluster.region.id == region.id
     assert cluster.k8s_version.id == version.id