Bug#813519: s390/template-arch: set always_halt to false to allow reboots

[Hendrik Brueckner <brueckner@linux.vnet.ibm.com>]

Package: rootskel
Version: 1.113
Severity: normal
Tags: d-i

Dear maintainer,

I work on some installer improvements for Linux on z Systems (s390).
After the installation completed, the newly installed Linux instance
is not booted; instead, the installer halts the system.  The reason
is a different default for the always_halt setting in templates-arch.

To prepare the re-IPL settings to boot the newly installed Linux
instance, the chreipl must be called.  I opened bug #813506 [1] for
the zipl-installer package to call chreipl.

I will attach a patch with changelog information soon.

Thanks and kind regards,
  Hendrik

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=813506