Handle invalid conditions for cluster delete in oebs-cloud.sh
Handle invalid conditions for cluster delete in oebs-cloud.sh

Added error handling for cases where :

- cluster creation has failed
- cluster is in invalid state
- kops delete cluster & s3 bucket deletion failures

The script will end gracefully in the above cases

Signed-off-by: ksatchit <4e09569602c0d91933a7f764cdb047663f85b57e@cloudbyte.com>

yudaykiran/openebs