Fix concurrent dnvm

src/dnvm.cmd

@@ -1,6 +1,6 @@
 @Echo off
 
-set DNVM_CMD_PATH_FILE="%USERPROFILE%\.dnx\temp-set-envvars.cmd"
+for /f "delims=" %%i in ('PowerShell -NoProfile -NoLogo -ExecutionPolicy unrestricted -Command "[System.IO.Path]::GetTempFileName()"') do set DNVM_CMD_PATH_FILE=%%i
 
 PowerShell -NoProfile -NoLogo -ExecutionPolicy unrestricted -Command "[System.Threading.Thread]::CurrentThread.CurrentCulture = ''; [System.Threading.Thread]::CurrentThread.CurrentUICulture = '';$CmdPathFile='%DNVM_CMD_PATH_FILE%';& '%~dp0dnvm.ps1' %*"
 

test/apps/TestApp/project.json

@@ -10,11 +10,11 @@
         "dnx451": { },
         "dnxcore50": {
             "dependencies": {
-                "System.Runtime": "4.0.0-*",
-                "System.Console": "4.0.0-*",
-                "System.Collections": "4.0.10-*",
-                "System.Diagnostics.Process": "4.0.0-*",
-                "System.Linq": "4.0.0-*"
+                "System.Runtime": "4.0.21-beta-23225",
+                "System.Console": "4.0.0-beta-23225",
+                "System.Collections": "4.0.11-beta-23225",
+                "System.Diagnostics.Process": "4.0.0-beta-23225",
+                "System.Linq": "4.0.1-23225"
             }
         }
     }