add no raid install :
just move scripts/local-top/mdadm from initrd
this will support Lenovo RD440 machine
deleted: operation/finish_install.py
new file: operation/finish_install/97update_initrd_noraid.sh
modified: text/get_instmode.sh
modified: interface/ri_inst_cli.py
new file: main/begin-install
modified: operation/finish_install/98state_grid_custom.py
new file: text/get_instmode.sh
new file: text/select_inst_mode.py