Modify upgrade not terminate after lockfile detected

Previously, when the upgrade failed in the initram the file
/sysroot/root/tmp_leapp_py3/.leapp_upgrade_failed has been generated and
upon detecting this file leapp triggered an emergency shell. This caused
the original failure to be hidden from the customer.

With this commit, we no longer crash immediately upon detecting the file
but rather continue and "wait" for the underlying issue and error to
emerge.

repos/system_upgrade/common/actors/commonleappdracutmodules/files/dracut/85sys-upgrade-redhat/do-upgrade.sh

@@ -282,6 +282,12 @@ do_upgrade() {
         local dirname
         dirname="$("$NEWROOT/bin/dirname" "$NEWROOT$LEAPP_FAILED_FLAG_FILE")"
         [ -d "$dirname" ] || mkdir "$dirname"
+
+        echo >&2 "Creating file $NEWROOT$LEAPP_FAILED_FLAG_FILE"
+        echo >&2 "Warning: Leapp upgrade failed and there is an issue blocking the upgrade."
+        echo >&2 "If possible, try to boot to the original system or restore the system from a backup."
+        echo >&2 "Please file a support case with $NEWROOT/var/log/leapp/leapp-upgrade.log attached"
+
         "$NEWROOT/bin/touch" "$NEWROOT$LEAPP_FAILED_FLAG_FILE"
     fi
 
@@ -358,10 +364,9 @@ mount -o "remount,rw" "$NEWROOT"
     # check if leapp previously failed in the initramfs, if it did return to the emergency shell
     [ -f "$NEWROOT$LEAPP_FAILED_FLAG_FILE" ] && {
         echo >&2 "Found file $NEWROOT$LEAPP_FAILED_FLAG_FILE"
-        echo >&2 "Error: Leapp previously failed and cannot continue, returning back to emergency shell"
+        echo >&2 "Warning: Leapp failed on a previous execution and something might be blocking the upgrade."
+        echo >&2 "If possible, try to boot to the original system or restore the system from a backup."
         echo >&2 "Please file a support case with $NEWROOT/var/log/leapp/leapp-upgrade.log attached"
-        echo >&2 "To rerun the upgrade upon exiting the dracut shell remove the $NEWROOT$LEAPP_FAILED_FLAG_FILE file"
-        exit 1
     }
 
     [ ! -x "$NEWROOT$LEAPPBIN" ] && {