fence_scsi: Add support for space-separated devices and update in meta-data

[arslan9292]

Currently the devices associated with fence_scsi should be comma-separated. With this commit, fence_scsi will also work if the 'devices' are space-separated.

Additionally, this commit includes meta-data update:

1. For fence_scsi:

   • The 'devices' parameter is optional if the cluster is configured with clvm/lvmlock.
   • The 'devices' parameter can be comma or space-separated.

2. For fence_mpath:

   • The 'devices' parameter can be comma or space-separated.

[knet-ci-bot]

Can one of the admins verify this patch?

[oalbrigt]

ok to test

[oalbrigt]

Thanks.