adding cache cleaning to trim down image size

Author: Marcus Levine

tasks/install.yml

@@ -33,4 +33,12 @@
   pip:
     name: virtualenv
     state: latest
-    executable: /usr/bin/pip
+    executable: /usr/bin/pip
+
+- name: Clean yum cache
+  command: yum clean all
+  when: ansible_os_family == 'RedHat'
+
+- name: Clean apt cache
+  command: apt-get autoclean
+  when: ansible_os_family == 'Debian'