remove deprecated fields in examples

Author: jiangong

examples/networking/route_table_attachment/route_table_attachment.tf

@@ -101,13 +101,17 @@ resource "oci_core_instance" "example_instance" {
   availability_domain = "${data.oci_identity_availability_domain.ad.name}"
   compartment_id      = "${var.compartment_ocid}"
   display_name        = "testInstance"
-  hostname_label      = "instance"
-  image               = "${var.instance_image_ocid[var.region]}"
   shape               = "${var.instance_shape}"
 
   create_vnic_details {
+    hostname_label         = "instance"
     subnet_id              = "${oci_core_subnet.example_subnet.id}"
     skip_source_dest_check = true
     assign_public_ip       = true
   }
+
+  source_details {
+    source_type = "image"
+    source_id   = "${var.instance_image_ocid[var.region]}"
+  }
 }

examples/storage/block/volume_group/block.tf

@@ -42,7 +42,11 @@ resource "oci_core_volume" "t2" {
   compartment_id      = "${var.compartment_ocid}"
   display_name        = "-tf-volume-with-backup-policy"
   size_in_gbs         = "${var.DBSize}"
-  backup_policy_id    = "${data.oci_core_volume_backup_policies.test_boot_volume_backup_policies.volume_backup_policies.0.id}"
+}
+
+resource "oci_core_volume_backup_policy_assignment" "policy" {
+  asset_id  = "${oci_core_volume.t2.id}"
+  policy_id = "${data.oci_core_volume_backup_policies.test_boot_volume_backup_policies.volume_backup_policies.0.id}"
 }
 
 data "oci_core_volume_backup_policies" "test_boot_volume_backup_policies" {