Remove hardcoded value of PVM instance id(Service instance ID) for node and controller plugin deployment files

[Madhan-SWE]

The value for service instance id is hard coded in the deployment files of node and controller plugins.
Need to remove the hardcoded values and fetch the value automatically from the script.

[Madhan-SWE]

Update:

• Explored CSI Driver basics
• Deployed PowerVS CSI Driver in a single node Kubernetes cluster and fixed deployment issues
• Passed the hostname of the pod from the deployment file and got service instance id by using the host name
• The service instance id was removed from the deployment file, but getting service instance id using host name has limitation that 2 service instances cannot have VMs of same name
• Working on alternate fixes using node labels

[Madhan-SWE]

/assign

[Madhan-SWE]

Updates:

• Explored EBS CSI Driver code and added meta service for getting the metadata information about the node
• Explored RBAC in Kubernetes and setup service account, cluster role and cluster role binding for node plugin
• Fixed the issue by collecting service instance id from node labels
• PR is submitted