The numeric hex value at the end is not valid for a namespace name.

#################################
Creating kube namespace
#################################

The Namespace "bookinfo-test-7B93491F" is invalid: metadata.name: Invalid value: "bookinfo-test-7B93491F": a DNS-1123 label must consist of lower case alphanumeric characters or '-', and must start and end with an alphanumeric character (e.g. 'my-name', or '123-abc', regex used for validation is 'a-z0-9?')
/Users/andracis/gows/src/istio.io/istio/tests/kubeUtils.sh: line 33: Failed to create namespace (exit 1)