[deploy-env] Do not use kubernetes.core ansible module

It fails with the error: `No module named 'yaml'`.
So let's use native helm with the ansible shell instead.

Change-Id: If652d603cfcaeb0b70c9b566b90d98e627d3bada

roles/deploy-env/tasks/flannel.yaml

@@ -1,20 +1,17 @@
 ---
 - name: Add Flannel Helm repo
-  become: false
+  become_user: "{{ kubectl.user }}"
   when: inventory_hostname in (groups['primary'] | default([]))
   block:
     - name: Add Flannel chart repo
-      kubernetes.core.helm_repository:
-        name: flannel
-        repo_url: "https://flannel-io.github.io/flannel/"
+      shell: |
+        helm repo add flannel https://flannel-io.github.io/flannel/
 
     - name: Install Flannel
-      kubernetes.core.helm:
-        name: flannel
-        chart_ref: flannel/flannel
-        namespace: kube-flannel
-        create_namespace: true
-        chart_version: "{{ flannel_version }}"
-        release_values:
-          podCidr: "{{ kubeadm.pod_network_cidr }}"
+      shell: |
+        helm upgrade --install flannel flannel/flannel \
+          --version {{ flannel_version }} \
+          --namespace kube-flannel \
+          --create-namespace \
+          --set podCidr="{{ kubeadm.pod_network_cidr }}"
 ...

roles/deploy-env/tasks/metallb.yaml

@@ -16,17 +16,17 @@
   when: inventory_hostname in (groups['primary'] | default([]))
   block:
     - name: Add MetalLB chart repo
-      kubernetes.core.helm_repository:
-        name: metallb
-        repo_url: "https://metallb.github.io/metallb"
+      become_user: "{{ kubectl.user }}"
+      shell: |
+        helm repo add metallb https://metallb.github.io/metallb
 
     - name: Install MetalLB
-      kubernetes.core.helm:
-        name: metallb
-        chart_ref: metallb/metallb
-        chart_version: "{{ metallb_version }}"
-        namespace: metallb-system
-        create_namespace: true
+      become_user: "{{ kubectl.user }}"
+      shell: |
+        helm upgrade --install metallb metallb/metallb \
+          --version {{ metallb_version }} \
+          --namespace metallb-system \
+          --create-namespace
 
     - name: Sleep before trying to check MetalLB pods
       pause: