Description of problem:  

VirtualMachineInstances was missing in readme in Read Access block of visualizing VirtualMachine section of topology plugin

Add snippets for read access for virtual machine and virtual machine instances in clusterrole file 

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Open Readme of Topology plugin
2. Go to To view Virtual Machines section
3. Go to code snippet section for providing read access

      1. Open clusterrole.yaml file

       2. See the code snippets 

Actual results:

**

virtualmachineinstances is missing

In clusterole.yaml file , code snippets is missing  for providing read access for virtual machine and virtual machine instances 

Expected results:

virtualmachineinstances should be there in resources for read access ** 

In clusterole.yaml file Snippets should be there for providing read access for virtual machine and virtual machine instances 

Reproducibility (Always/Intermittent/Only Once):

Build Details:

Additional info (Such as Logs, Screenshots, etc):