Added cloudera (cdh4) repo (required for compute engine dependencies)

roles/repos/files/etc/yum.repos.d/cloudera-cdh4.repo

+[cloudera-cdh4]
+name=Cloudera's Distribution for Hadoop, Version 4
+baseurl=http://archive.cloudera.com/cdh4/redhat/$releasever/$basearch/cdh/4/
+gpgkey =  http://archive.cloudera.com/cdh4/redhat/$releasever/$basearch/cdh/RPM-GPG-KEY-cloudera
+gpgcheck = 1
+enabled = 1

roles/repos/tasks/main.yml

@@ -30,3 +30,10 @@
         dest=/etc/yum.repos.d/EGI-trustanchors.repo backup=no
         owner=root group=root mode=0644
   when: inventory_hostname in groups.standalone
+
+- name: Install cloudera-cdh4 repo
+  tags: cloudera-cdh4_repo
+  copy: src=etc/yum.repos.d/cloudera-cdh4.repo
+        dest=/etc/yum.repos.d/cloudera-cdh4.repo backup=no
+        owner=root group=root mode=0644
+  when: inventory_hostname in groups.standalone