import_role takes name as a parameter, not role.

According to ansible documentation[1] the import_role task uses 'name'
as a parameter for import_role, not 'role'.

[1] https://docs.ansible.com/ansible/2.4/import_role_module.html

Change-Id: Ibda367ed44eb9ddca04c266f5c40134f10dfe945
Closes-Bug: #1797412

docker/services/ironic-conductor.yaml

@@ -195,7 +195,7 @@ outputs:
       host_prep_tasks:
         - name: load iscsi_tcp module
           import_role:
-            role: tripleo-module-load
+            name: tripleo-module-load
           vars:
             modules:
               - name: iscsi_tcp

docker/services/keepalived.yaml

@@ -107,7 +107,7 @@ outputs:
       host_prep_tasks:
         - name: load ip_vs module
           import_role:
-            role: tripleo-module-load
+            name: tripleo-module-load
           vars:
             modules:
               - name: ip_vs

docker/services/multipathd.yaml

@@ -89,7 +89,7 @@ outputs:
       host_prep_tasks:
         - name: load dm-multipath
           import_role:
-            role: tripleo-module-load
+            name: tripleo-module-load
           vars:
             modules:
               - name: dm-multipath

docker/services/neutron-ovs-agent.yaml

@@ -193,7 +193,7 @@ outputs:
             - block:
               - name: load openvswitch module
                 import_role:
-                  role: tripleo-module-load
+                  name: tripleo-module-load
                 vars:
                   modules:
                     - name: openvswitch