[Bug]: `fluvio cluster install` hangs indefinitely when `minikube tunnel` is not up

What happened Executing fluvio cluster install hangs indefinitely when minikube tunnel is not running. The CLI hangs, showing this:

Performing pre-flight checks
✔️  ok: Kubernetes config is loadable
✔️  ok: Supported helm version is installed
✔️  ok: Fluvio system charts are installed

Expected behavior I would expect the pre-flight checks to notify me that minikube tunnel is not running and suggest for me to run it.

Describe the setup

Attempting to install Fluvio onto minikube

How to reproduce it (as minimally and precisely as possible) Steps to reproduce the behavior:

Run minikube start --driver=hyperkit
Run fluvio cluster install

Log output There are no logs since the installation never completed.

Environment (please complete the following information):

OS: Mac 10.15.7
Fluvio Version [e.g. 22]

Fluvio version : 0.6.0-alpha.5
Git Commit     : bf065c377e98685094f842577d76f0e487d8cf93
OS Details     : Darwin 19.6.0 x86_64
Rustc Version  : 1.47.0 (18bf6b4 2020-10-07)

Minikube version (if used): use minikube version

minikube version: v1.15.1
commit: 23f40a012abb52eff365ff99a709501a61ac5876

Kubernetes version: use kubectl version

Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.4", GitCommit:"d360454c9bcd1634cf4cc52d1867af5491dc9c5f", GitTreeState:"clean", BuildDate:"2020-11-12T01:09:16Z", GoVersion:"go1.15.4", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.4", GitCommit:"d360454c9bcd1634cf4cc52d1867af5491dc9c5f", GitTreeState:"clean", BuildDate:"2020-11-11T13:09:17Z", GoVersion:"go1.15.2", Compiler:"gc", Platform:"linux/amd64"}

infinyon / fluvio

[Bug]: `fluvio cluster install` hangs indefinitely when `minikube tunnel` is not up #517