Automatic merge from submit-queue

kubectl: Adding IPv6 brackets for IPv6 endpoints

This fixes the lack of IPv6 when printing the IP:Port tuple with kubectl
describe command.
Signed-off-by: André Martins <aanm90@gmail.com>

**What this PR does / why we need it**: This adds IPv6 brackets on IPv6 endpoints when using `kubectl describe service`

**Special notes for your reviewer**: Since the IP is a string I think the fastest way to detect if it's an IPv6 was to check for the presence of : in it. Let me know what you think.