We no longer support any OS distros that use /etc/modules.

Change-Id: Ic41cad64ed0479a0cef7321aeed191fe06a30e8f

Change-Id: Ib9c13b69b46cdc3e28be127ccd86df9b59bd60e9

1. Adjust the order of src and dest for template module
2. Remove the double quotes from task's name to keep consistence with
the others.
3. Add a space after "|"

Change-Id: I580517d5b95dcaa34841def70ec6f57a5cbe0229

All other roles also use defaults/main.yml.

Change-Id: Ic03aba436a4f3c775ff8e815c93e1d52250d5411

Known kernel modules are:
- dm-multipath (for multipathd)
- ip_vs (for keepalived)
- iscsi_tcp (for ironic-conductor)
- openvswitch (for openvswitch-vswitchd)

Change-Id: I1841ec30cde142c8019830ad3190847dfe493eb9