Fix 2.2 benchmarks (#4322)

Author: BrennanConroy

src/SignalR/benchmarkapps/BenchmarkServer/BenchmarkServer.csproj

@@ -2,8 +2,8 @@
 
   <PropertyGroup>
     <TargetFramework>netcoreapp2.2</TargetFramework>
-    <!-- SignalR is versioned 1.0 alongside the 2.1 version of AspNetCore.All, this converts the .All version to the SignalR version -->
-    <MessagePackPackageVersion Condition=" '$(BenchmarksTargetFramework)' != '' ">$([System.String]::Copy($(MicrosoftAspNetCoreAllPackageVersion)).Replace('2.2', '1.1'))</MessagePackPackageVersion>
+    <!-- Protocols.MessagePack isn't part of the .All metapackage, so we need to manually add it -->
+    <MessagePackPackageVersion Condition=" '$(BenchmarksTargetFramework)' != '' ">1.1.0</MessagePackPackageVersion>
   </PropertyGroup>
 
   <ItemGroup>

src/SignalR/benchmarkapps/BenchmarkServer/signalr.json

@@ -2,9 +2,9 @@
   "Default": {
     "Client": "SignalR",
     "Source": {
-      "Repository": "https://github.com/aspnet/SignalR.git",
+      "Repository": "https://github.com/aspnet/AspNetCore.git",
       "BranchOrCommit": "release/2.2",
-      "Project": "benchmarkapps/BenchmarkServer/BenchmarkServer.csproj"
+      "Project": "src/signalr/benchmarkapps/BenchmarkServer/BenchmarkServer.csproj"
     },
     "Connections": 10,
     "Duration": 20,