Fix IP address leak in k8s environments
Remove internal IP address from token POST in k8s environments (#90) When running the hpegl provider in k8s environments a bogus IAM Issuer URL in the supplied API client creds will result in the internal IP address of the running container being contained in the error message from the IAM POST command to retrieve a token. This PR sanitises the relevant error message and removes the IP address. Signed-off-by: Eamonn O'Toole <eamonn.otoole@hpe.com>