KUDU-1938 Add VARCHAR to tooling and helpers pt 7

VARCHAR support was missing from some tools and helpers, adding them
here.

Change-Id: I84257c71528dafdf9c01c0d3cdda44a626ed7f67
Reviewed-on: http://gerrit.cloudera.org:8080/14831
Tested-by: Kudu Jenkins
Reviewed-by: Adar Dembo <adar@cloudera.com>
3 files changed