[stable/zed] Add fixes for Portworx (#1461)

Restart multipathd
Fix portworx token typo
Create namespace ahead of time\n\nCloses #1435
diff --git a/roles/portworx/tasks/main.yml b/roles/portworx/tasks/main.yml
index 3b3138a..9c7b34e 100644
--- a/roles/portworx/tasks/main.yml
+++ b/roles/portworx/tasks/main.yml
@@ -33,6 +33,15 @@
         group: root
         mode: "0644"
 
+- name: Create namespace
+  kubernetes.core.k8s:
+    state: present
+    definition:
+      apiVersion: v1
+      kind: Namespace
+      metadata:
+        name: portworx
+
 - name: Install Portworx
   run_once: true
   kubernetes.core.k8s: