Give VM a chance to reject old backup-utils versions

This is a bit of a hack but lets new versions of the VM reject
backup-utils restores if the version is too old. I'd like to move
this into the ghe-host-check negotiation but we need this for
current versions of backup-utils.

Author: rtomayko

share/github-backup-utils/ghe-maintenance-mode-enable

@@ -44,7 +44,7 @@ fi
 
 # SSH to the appliance and run the remote maintenance mode enable command
 echo "Enabling maintenance mode on $host ..."
-ghe-ssh "$host" -- "ghe-maintenance -s"
+ghe-ssh "$host" -- "/usr/bin/env GHEBUVER=2 ghe-maintenance -s"
 
 # Bail out early if --no-wait was given.
 $wait_procs || exit 0

share/github-backup-utils/ghe-restore-settings

@@ -28,10 +28,10 @@ if [ "$GHE_VERSION_MAJOR" -ge 2 ]; then
   # work around issue importing settings with bad storage mode values
   cat "$GHE_RESTORE_SNAPSHOT_PATH/settings.json" |
     sed 's/"storage_mode": "device"/"storage_mode": "rootfs"/' |
-    ghe-ssh "$GHE_HOSTNAME" -- 'ghe-import-settings' 1>&3
+    ghe-ssh "$GHE_HOSTNAME" -- '/usr/bin/env GHEBUVER=2 ghe-import-settings' 1>&3
 else
     cat "$GHE_RESTORE_SNAPSHOT_PATH/settings.json" |
-    ghe-ssh "$GHE_HOSTNAME" -- 'ghe-import-settings' 1>&3
+    ghe-ssh "$GHE_HOSTNAME" -- '/usr/bin/env GHEBUVER=2 ghe-import-settings' 1>&3
 fi
 
 # Bail out if we're restoring against a pre-2.x appliance. Everything below is