fcoe: remove /etc/fcoe dir if it exists before copying configuration (#1542846)
fcoe: remove /etc/fcoe dir if it exists before copying configuration (#1542846)

On image installation or live installation the configuration directory may
already exist.  Remove it in this case before copying the configuration (same
as we do for iscsi).

rvykydal/blivet,jkonecny12/blivet,jkonecny12/blivet,rvykydal/blivet,vojtechtrefny/blivet,vojtechtrefny/blivet