Updated Host project to rely on the new OnTopic.All metapackage

The `Host` project isn't just a way of doing quick testing of the OnTopic Library; it's also a barebones reference for how an OnTopic implementation is expected to be configured. Given that, it should use the new `OnTopic.All` metapackage, which is what we expect most customers will use.

Author: JeremyCaney

OnTopic.AspNetCore.Mvc.Host/OnTopic.AspNetCore.Mvc.Host.csproj

@@ -15,11 +15,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\OnTopic.AspNetCore.Mvc\OnTopic.AspNetCore.Mvc.csproj" />
-    <ProjectReference Include="..\OnTopic.Data.Caching\OnTopic.Data.Caching.csproj" />
-    <ProjectReference Include="..\OnTopic.Data.Sql\OnTopic.Data.Sql.csproj" />
-    <ProjectReference Include="..\OnTopic.ViewModels\OnTopic.ViewModels.csproj" />
-    <ProjectReference Include="..\OnTopic\OnTopic.csproj" />
+    <ProjectReference Include="..\OnTopic.All\OnTopic.All.csproj" />
   </ItemGroup>
 
 </Project>