Adding Import tests for Role Definitions

```
$ acctests azurerm TestAccAzureRMRoleDefinition_import
=== RUN   TestAccAzureRMRoleDefinition_importBasic
--- PASS: TestAccAzureRMRoleDefinition_importBasic (16.32s)
=== RUN   TestAccAzureRMRoleDefinition_importComplete
--- PASS: TestAccAzureRMRoleDefinition_importComplete (14.12s)
PASS
ok      github.com/terraform-providers/terraform-provider-azurerm/azurerm    30.462s
```

azurerm/import_arm_role_definition_test.go

@@ -0,0 +1,59 @@
+package azurerm
+
+import (
+	"testing"
+
+	"github.com/google/uuid"
+	"github.com/hashicorp/terraform/helper/acctest"
+	"github.com/hashicorp/terraform/helper/resource"
+)
+
+func TestAccAzureRMRoleDefinition_importBasic(t *testing.T) {
+	resourceName := "azurerm_role_definition.test"
+
+	id := uuid.New().String()
+	ri := acctest.RandInt()
+	config := testAccAzureRMRoleDefinition_basic(id, ri)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMRoleDefinitionDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+			},
+			{
+				ResourceName:            resourceName,
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"role_definition_id", "scope"},
+			},
+		},
+	})
+}
+
+func TestAccAzureRMRoleDefinition_importComplete(t *testing.T) {
+	resourceName := "azurerm_role_definition.test"
+
+	id := uuid.New().String()
+	ri := acctest.RandInt()
+	config := testAccAzureRMRoleDefinition_complete(id, ri)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMRoleDefinitionDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+			},
+			{
+				ResourceName:            resourceName,
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"role_definition_id", "scope"},
+			},
+		},
+	})
+}

azurerm/resource_arm_role_definition.go

@@ -26,6 +26,7 @@ func resourceArmRoleDefinition() *schema.Resource {
 				Required: true,
 				ForceNew: true,
 			},
+
 			"name": {
 				Type:     schema.TypeString,
 				Required: true,