Use multipathd hostgroup in the multipathd role

There is already a multipathd hostgroup in the inventory.
This hostgroup should be used in this role.

Change-Id: If0cc0f8e4b81f71c40357bdba66bc2c62d72dfd8

ansible/roles/multipathd/tasks/config.yml

@@ -7,7 +7,7 @@
     group: "{{ config_owner_group }}"
     mode: "0770"
   become: true
-  when: inventory_hostname in groups['compute']
+  when: inventory_hostname in groups['multipathd']
   with_items:
     - "multipathd"
 
@@ -17,7 +17,7 @@
     dest: "{{ node_config_directory }}/{{ item }}/config.json"
     mode: "0660"
   become: true
-  when: inventory_hostname in groups['compute']
+  when: inventory_hostname in groups['multipathd']
   with_items:
     - "multipathd"
 

ansible/roles/multipathd/tasks/start.yml

@@ -18,4 +18,4 @@
       - "/sys/kernel/config:/configfs"
       - "cinder:/var/lib/cinder"
       - "iscsi_info:/etc/iscsi"
-  when: inventory_hostname in groups['compute']
+  when: inventory_hostname in groups['multipathd']