Add fixes from comments

- Adds docs to sidebar
- Changes `volume` to `volume_name` in volume snapshot
- Fixes tests
- Changes `parent_volume_bootable` to boolean, and converts to string for API

```
$ make testacc TEST=./builtin/providers/opc TESTARGS="-run=TestAccOPCStorageVolumeSnapshot_basic"
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/04/06 12:26:59 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/opc -v -run=TestAccOPCStorageVolumeSnapshot_basic -timeout 120m
=== RUN   TestAccOPCStorageVolumeSnapshot_basic
--- PASS: TestAccOPCStorageVolumeSnapshot_basic (24.45s)
PASS
ok      github.com/hashicorp/terraform/builtin/providers/opc    24.476s
```

builtin/providers/opc/resource_storage_volume_snapshot.go

@@ -2,6 +2,7 @@ package opc
 
 import (
 	"fmt"
+	"strconv"
 
 	"github.com/hashicorp/go-oracle-terraform/compute"
 	"github.com/hashicorp/terraform/helper/schema"
@@ -18,7 +19,7 @@ func resourceOPCStorageVolumeSnapshot() *schema.Resource {
 
 		Schema: map[string]*schema.Schema{
 			// Required Attributes
-			"volume": {
+			"volume_name": {
 				Type:     schema.TypeString,
 				Required: true,
 				ForceNew: true,
@@ -40,10 +41,10 @@ func resourceOPCStorageVolumeSnapshot() *schema.Resource {
 			},
 
 			"parent_volume_bootable": {
-				Type:     schema.TypeString,
+				Type:     schema.TypeBool,
 				Optional: true,
 				ForceNew: true,
-				Default:  "false",
+				Default:  false,
 			},
 
 			"collocated": {
@@ -124,7 +125,7 @@ func resourceOPCStorageVolumeSnapshotCreate(d *schema.ResourceData, meta interfa
 
 	// Get required attribute
 	input := &compute.CreateStorageVolumeSnapshotInput{
-		Volume: d.Get("volume").(string),
+		Volume: d.Get("volume_name").(string),
 	}
 
 	if v, ok := d.GetOk("description"); ok {
@@ -135,8 +136,10 @@ func resourceOPCStorageVolumeSnapshotCreate(d *schema.ResourceData, meta interfa
 		input.Name = v.(string)
 	}
 
-	if v, ok := d.GetOk("parent_volume_bootable"); ok {
+	// Convert parent_volume_bootable to string
-		input.ParentVolumeBootable = v.(string)
+	bootable := d.Get("parent_volume_bootable").(bool)
+	if bootable {
+		input.ParentVolumeBootable = "true"
 	}
 
 	collocated := d.Get("collocated").(bool)
@@ -180,10 +183,9 @@ func resourceOPCStorageVolumeSnapshotRead(d *schema.ResourceData, meta interface
 		return nil
 	}
 
-	d.Set("volume", result.Volume)
+	d.Set("volume_name", result.Volume)
 	d.Set("description", result.Description)
 	d.Set("name", result.Name)
-	d.Set("parent_volume_bootable", result.ParentVolumeBootable)
 	d.Set("property", result.Property)
 	d.Set("platform", result.Platform)
 	d.Set("account", result.Account)
@@ -197,6 +199,12 @@ func resourceOPCStorageVolumeSnapshotRead(d *schema.ResourceData, meta interface
 	d.Set("status_timestamp", result.StatusTimestamp)
 	d.Set("uri", result.URI)
 
+	bootable, err := strconv.ParseBool(result.ParentVolumeBootable)
+	if err != nil {
+		return fmt.Errorf("Error converting parent volume to boolean: %v", err)
+	}
+	d.Set("parent_volume_bootable", bootable)
+
 	if result.Property != compute.SnapshotPropertyCollocated {
 		d.Set("collocated", false)
 	} else {

builtin/providers/opc/resource_storage_volume_snapshot_test.go

@@ -82,7 +82,7 @@ resource "opc_compute_storage_volume_snapshot" "test" {
   name = "test-acc-stor-vol-%d"
   description = "storage volume snapshot"
   collocated = true
-  volume = "${opc_compute_storage_volume.foo.name}"
+  volume_name = "${opc_compute_storage_volume.foo.name}"
 }
 `, rInt, rInt)
 }

builtin/providers/opc/resource_storage_volume_test.go

@@ -241,7 +241,7 @@ resource "opc_compute_storage_volume_snapshot" "foo" {
   description = "testing-acc"
   name = "test-acc-stor-snapshot-%d"
   collocated = true
-		volume = "${opc_compute_storage_volume.foo.name}"
+  volume_name = "${opc_compute_storage_volume.foo.name}"
 }
 
 // Create storage volume from snapshot

website/source/docs/providers/opc/r/opc_compute_storage_volume_snapshot.html.markdown

@@ -18,6 +18,7 @@ resource "opc_compute_storage_volume_snapshot" "test" {
   description = "Description for the Storage Volume"
   tags        = ["bar", "foo"]
   collocated  = true
+  volume_name = "${opc_compute_storage_volume.foo.name}"
 }
 ```
 
@@ -25,7 +26,7 @@ resource "opc_compute_storage_volume_snapshot" "test" {
 
 The following arguments are supported:
 
-* `volume` (Required) The name of the storage volume to create the snapshot from.
+* `volume_name` (Required) The name of the storage volume to create the snapshot from.
 * `description` (Optional) The description of the storage volume snapshot.
 * `name` (Optional) The name of the storage volume snapshot. Will be generated if unspecified.
 * `parent_volume_bootable` (Optional) A string value of whether or not the parent volume is 'bootable' or not. Defaults to `"false"`.

website/source/layouts/opc.erb

@@ -85,6 +85,9 @@
                         <li<%= sidebar_current("docs-opc-resource-storage-volume") %>>
                             <a href="/docs/providers/opc/r/opc_compute_storage_volume.html">opc_compute_storage_volume</a>
                         </li>
+                        <li<%= sidebar_current("docs-opc-resource-storage-volume-snapshot") %>>
+                            <a href="/docs/providers/opc/r/opc_compute_storage_volume_snapshot.html">opc_compute_storage_volume_snapshot</a>
+                        </li>
                         <li<%= sidebar_current("docs-opc-resource-vnic-set") %>>
                             <a href="/docs/providers/opc/r/opc_compute_vnic_set.html">opc_compute_vnic_set</a>
                         </li>