Added cmdlet to help create a database backup setting

Author: Nicholas King

src/ResourceManager/Websites/Commands.Websites/Cmdlets/BackupRestore/NewAzureRmWebAppDatabaseBackupSetting.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Management.Automation;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Azure.Commands.ResourceManager.Common;
+using Microsoft.Azure.Management.WebSites.Models;
+
+namespace Microsoft.Azure.Commands.WebApps.Cmdlets.BackupRestore
+{
+    /// <summary>
+    /// Modifies the automatic backup configuration for an Azure Web App
+    /// </summary>
+    [Cmdlet(VerbsCommon.New, "AzureRmWebAppDatabaseBackupSetting"), OutputType(typeof (DatabaseBackupSetting))]
+    public class NewAzureRmWebAppDatabaseBackupSetting : AzureRMCmdlet
+    {
+        [Parameter(Position = 0, Mandatory = true, HelpMessage = "The name of the database.",
+            ValueFromPipelineByPropertyName = true)]
+        [ValidateNotNullOrEmpty]
+        public string Name { get; set; }
+
+        [Parameter(Position = 1, Mandatory = true, HelpMessage = "The type of database, e.g. SqlAzure or MySql.",
+            ValueFromPipelineByPropertyName = true)]
+        [ValidateNotNullOrEmpty]
+        public string DatabaseType { get; set; }
+
+        [Parameter(Position = 2, Mandatory = true, HelpMessage = "The database's connection string. If the restore should happen to a new database, the database name inside is the new one.",
+            ValueFromPipelineByPropertyName = true)]
+        [ValidateNotNullOrEmpty]
+        public string ConnectionString { get; set; }
+
+        [Parameter(Position = 3, Mandatory = false, HelpMessage = "Contains a connection string name that is linked to the SiteConfig.ConnectionStrings. This is used during restore with overwrite connection strings options.",
+            ValueFromPipelineByPropertyName = true)]
+        public string ConnectionStringName { get; set; }
+
+        public override void ExecuteCmdlet()
+        {
+            DatabaseBackupSetting setting = new DatabaseBackupSetting()
+            {
+                Name = this.Name,
+                DatabaseType = this.DatabaseType,
+                ConnectionString = this.ConnectionString,
+                ConnectionStringName = this.ConnectionStringName
+            };
+            WriteObject(setting);
+        }
+    }
+}