Move System.Data.SqlClient version from csproj to dependencies.props (#303)

Author: mikeharder

build/dependencies.props

@@ -1,6 +1,14 @@
 <Project>
   <PropertyGroup>
     <AspNetCoreVersion>2.0.0-preview1-*</AspNetCoreVersion>
+
+    <!--
+      * Use 4.4.0-* instead of $(CoreFxVersion) to address "SqlClient fails with netcoreapp2.0 on Win7/Server2008"
+        * https://github.com/dotnet/corefx/issues/18406
+      * Revert if and when $(CoreFxVersion) is upgraded to 4.4.0-*
+    -->
+    <SqlClientVersion>4.4.0-*</SqlClientVersion>
+
     <CoreFxVersion>4.3.0</CoreFxVersion>
     <InternalAspNetCoreSdkVersion>2.0.0-*</InternalAspNetCoreSdkVersion>
     <MoqVersion>4.7.1</MoqVersion>

src/Microsoft.Extensions.Caching.SqlServer/Microsoft.Extensions.Caching.SqlServer.csproj

@@ -23,11 +23,11 @@
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.2' ">
     <!--
-      * Use 4.4.0-* instead of $(CoreFxVersion) to address "SqlClient fails with netcoreapp2.0 on Win7/Server2008"
+      * Use $(SqlClientVersion) instead of $(CoreFxVersion) to address "SqlClient fails with netcoreapp2.0 on Win7/Server2008"
         * https://github.com/dotnet/corefx/issues/18406
-      * Revert if and when $(CoreFxVersion) is upgraded to 4.4.0-*
+      * Revert if and when $(CoreFxVersion) is upgraded to match $(SqlClientVersion)
     -->
-    <PackageReference Include="System.Data.SqlClient" Version="4.4.0-*" />
+    <PackageReference Include="System.Data.SqlClient" Version="$(SqlClientVersion)" />
   </ItemGroup>
 
 </Project>