310 - bug - netapp-ontap_nfs_service resource

[csahu9]

Issue #310
fixed issue with idempotency when default value for few params is not set in config

ACC test result:

[root@scs000952326 protocols]# TF_ACC=1 go test `go list ./... | grep -e provider` -v -run=TestAccNfsServiceResource
=== RUN   TestAccNfsServiceResourceAlias
--- PASS: TestAccNfsServiceResourceAlias (12.04s)
=== RUN   TestAccNfsServiceResource
--- PASS: TestAccNfsServiceResource (15.81s)
PASS
ok      github.com/netapp/terraform-provider-netapp-ontap/internal/provider/protocols   27.859s