[client] Fix KuduSchema operator != bug

Operator != of KuduSchema should operate on objects not pointers.

Change-Id: I1c49feff42114e72c229a77ea502deca60bb3209
Reviewed-on: http://gerrit.cloudera.org:8080/17822
Reviewed-by: Alexey Serbin <aserbin@cloudera.com>
Tested-by: Kudu Jenkins
2 files changed