added roles for apt update and upgrade. added apt-upd role as dependency for builder role

Author: kaushikanurag

ansible/roles/apt_upd/tasks/main.yml

@@ -0,0 +1,4 @@
+---
+- name: update cache for apt repository
+  apt:
+    update_cache=yes

ansible/roles/apt_upg/tasks/main.yml

@@ -0,0 +1,4 @@
+---
+- name: upgrade a server
+  apt:
+     upgrade=full

ansible/roles/builder/meta/main.yml

@@ -1,3 +1,4 @@
 ---
 dependencies:
   - { role: docker }
+  - { role: apt_upd }