Fixing .NET Edge NUnit test project file

Author: jimevans

dotnet/test/edge/WebDriver.Edge.Tests.nunit

@@ -1,7 +1,7 @@
 <NUnitProject>
-	<Settings appbase="." />
-	<Config name="Default" binpathtype="Auto">
-		<assembly path="WebDriver.Common.Tests.dll" />
+  <Settings activeconfig="Default"/>
+  <Config name="Default" binpathtype="Auto" configfile="WebDriver.Edge.Tests.config">
+    <assembly path="WebDriver.Common.Tests.dll" />
 		<assembly path="WebDriver.Edge.Tests.dll" />
 	</Config>
 </NUnitProject>