Add datastore plugins as ref in service

Author: webprofusion-chrisc

src/Certify.Server/Certify.Server.Core/Certify.Server.Core/Certify.Server.Core.csproj

@@ -26,6 +26,9 @@
 
     </ItemGroup>
     <ItemGroup>
+        <ProjectReference Include="..\..\..\..\..\certify-plugins\src\DataStores\Postgres\Plugin.Datastore.Postgres.csproj" />
+        <ProjectReference Include="..\..\..\..\..\certify-plugins\src\DataStores\SQLite\Plugin.Datastore.SQLite.csproj" />
+        <ProjectReference Include="..\..\..\..\..\certify-plugins\src\DataStores\SQLServer\Plugin.Datastore.SQLServer.csproj" />
         <ProjectReference Include="..\..\..\..\..\certify\src\Certify.Core\Certify.Core.csproj" />
         <ProjectReference Include="..\..\..\..\..\certify\src\Certify.Models\Certify.Models.csproj" />
         <ProjectReference Include="..\..\..\..\..\certify\src\Certify.Shared\Certify.Shared.Core.csproj" />