Got reintroduced by mistake in 39c5b7d.

glibc-gconv-extra was included by default in the past and
we need it otherwise mkfs.msdos will fail with:
``Cannot initialize conversion from codepage 850 to ANSI_X3.4-1968: Invalid argument``
``Cannot initialize conversion from ANSI_X3.4-1968 to codepage 850: Invalid argument``
subsequently making mmd fail with:
``Error converting to codepage 850 Invalid argument``
``Cannot initialize '::'``
This is due to the conversion table missing codepage 850, included
in glibc-gconv-extra

Remove unused dependencies - take 2

Iury is the Ironic PTL (project team lead) and has been consistently
reviewing ironic-image changes in his reviewer role.

Stephen has moved to another role.

Fix missing codepage 850 in conversion table

Promote Iury to approvers, remove Stephen

There seems to be an issue where ipmitool does not retry with different
ciphers. This could be worked around by letting Ironic handle the retry
instead.

…stead-of-ipmitool

Let Ironic handle retry instead of ipmitool

Also exit on error

Also moved the version to an ARG

Add verbose logging to prepare-efi.sh

Clean packages after install and added some env vars to sushy-tools container