packaging: Set default limit for core file size in init scripts

packaging: Set default limit for core file size in init scripts

SysV init scripts used for initiating smb and winbind services
determines the value for default limit of coredump from variable
named DAEMON_COREFILE_LIMIT within a bash env. Therefore this
patch explicitly sets this variable to 'unlimited' so as to have
no limit for core file size by default.

Signed-off-by: Anoop C S <anoopcs@redhat.com>
Reviewed-by: Jose A. Rivera <jarrpa@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>