k8s: minor updates to the StatefulSet

I walked through some of the Kubernetes README and noticed the ports
were off. This updates to use the typical defaults we use for masters
and tservers.

It also updates to use 4 tservers, which is closer to what would be used
in production, given 3-4-3 replication.

Change-Id: I50b0084f70d30187bcca4e356e38c35b2486c611
Reviewed-on: http://gerrit.cloudera.org:8080/17098
Tested-by: Kudu Jenkins
Reviewed-by: Hao Hao <hao.hao@cloudera.com>
Reviewed-by: Alexey Serbin <aserbin@cloudera.com>
3 files changed