Adding driver installation with yum

Former-commit-id: 5cc65913

roles/gpu/tasks/main.yml

@@ -114,7 +114,7 @@
   template: src=xserver.j2 dest=/etc/pam.d/xserver
   sudo: true
 
-- name: install driver with yum
+- name: Install driver with yum
   shell: yum -y install cuda-drivers
   sudo: true
   when: install_driver