Launch in VS2015 by default and include missing NuGet package. Resolves build issues for new users. (Azure#3312)

Author: jogietze

src/ResourceManager/Sql/Commands.Sql.Test/packages.config

@@ -23,6 +23,7 @@
   <package id="Microsoft.Rest.ClientRuntime" version="2.3.4" targetFramework="net45" />
   <package id="Microsoft.Rest.ClientRuntime.Azure" version="3.3.4" targetFramework="net45" />
   <package id="Microsoft.Rest.ClientRuntime.Azure.Authentication" version="2.2.9-preview" targetFramework="net45" />
+  <package id="Microsoft.Rest.ClientRuntime.Azure.TestFramework" version="1.5.0-preview" targetFramework="net45" />
   <package id="Microsoft.WindowsAzure.Management" version="4.1.1" targetFramework="net45" />
   <package id="Microsoft.WindowsAzure.Management.Storage" version="5.1.1" targetFramework="net45" />
   <package id="Moq" version="4.2.1510.2205" targetFramework="net45" />

src/ResourceManager/Sql/Sql.sln

@@ -1,5 +1,5 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2013
+# Visual Studio 2015
 VisualStudioVersion = 12.0.31101.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tests", "Tests", "{95C16AED-FD57-42A0-86C3-2CF4300A4817}"