Change to remove old driver before installing new one. This is to prevent situations

where old rpm's are still left on the system. As a result of this Lustre packages are
uninstalled so you will need to call lustre role after invoking it. This code comes
directly from update  clusterbuild/local_roles/m3_force_upgrade

roles/mellanox_drivers/tasks/main.yml

@@ -65,10 +65,53 @@
   become_user: root
   when: install_now
 
+#remove old mellanox drivers as they may interfere with an update
+- name: stop lustre 
+  service: name=lustre-client state=stopped
+  become: true
+  become_user: root
+  ignore_errors: true
+  when: install_now
+
+- name: remove ipa stuff
+  yum: name={{ item }} state=absent
+  become: true
+  become_user: root
+  ignore_errors: true
+  with_items:
+  - ipa-common
+  - ipa-python-compat
+  - python2-ipalib
+  when: install_now
+
+- name: remove unnecessary packages that break stuff
+  yum: name={{ item }} state=absent
+  become: true
+  become_user: root
+  ignore_errors: true
+  with_items:
+  - libgpod
+  - usbmuxd
+  - libmlx5
+  - libmlx4
+  - libibverbs
+  when: install_now
+
+- name: remove mellanox rpms
+  yum: name={{ item }} state=absent
+  become: true
+  become_user: root
+  ignore_errors: true
+  with_items:
+  - mlnx-ofa_kernel 
+  - mlnx-ofa_kernel-devel 
+  - mlnx-ofa_kernel-modules
+  when: install_now
+
+
 - name: install drivers
   shell: ./mlnxofedinstall -q --add-kernel-support --force --skip-repo
   args:
-    #more changes
     chdir: "/tmp/{{ MELLANOX_DRIVER_SRC }}"
   become: true
   become_user: root