Added Vagrantfile for build environment with Vagrant (#14)

* Added .vagrant to ignore

* Added Vagrantfile

* Added section for Vagrant

* made retry_count customizeable (default 20)

roles/k3s/master/tasks/main.yml

@@ -1,4 +1,5 @@
 ---
+
 - name: Clean previous runs of k3s-init
   systemd:
     name: k3s-init
@@ -83,7 +84,7 @@
         cmd: k3s kubectl get nodes -l "node-role.kubernetes.io/master=true" -o=jsonpath="{.items[*].metadata.name}"
       register: nodes
       until: nodes.rc == 0 and (nodes.stdout.split() | length) == (groups['master'] | length)
-      retries: 20
+      retries: "{{ retry_count | default(20) }}"
       delay: 10
       changed_when: false
   always: