Fixed some tests.

Author: timcassell

tests/BenchmarkDotNet.IntegrationTests/LargeAddressAwareTest.cs

@@ -25,7 +25,7 @@ public void BenchmarkCanAllocateMoreThan2Gb()
             var summary = BenchmarkRunner
                 .Run<NeedsMoreThan2GB>(
                     ManualConfig.CreateEmpty()
-                        .AddJob(Job.Dry.WithRuntime(CoreRuntime.Core70).WithPlatform(Platform.X64).WithId("Core"))
+                        .AddJob(Job.Dry.WithRuntime(CoreRuntime.Core80).WithPlatform(Platform.X64).WithId("Core"))
                         .AddJob(Job.Dry.WithRuntime(ClrRuntime.Net462).WithPlatform(Platform.X86).WithGcServer(false).WithLargeAddressAware().WithId("Framework"))
                         .AddColumnProvider(DefaultColumnProviders.Instance)
                         .AddLogger(new OutputLogger(output)));

tests/BenchmarkDotNet.IntegrationTests/MultipleRuntimesTest.cs

@@ -29,7 +29,7 @@ public void SingleBenchmarkCanBeExecutedForMultipleRuntimes()
             var summary = BenchmarkRunner
                 .Run<C>(
                     ManualConfig.CreateEmpty()
-                        .AddJob(Job.Dry.WithRuntime(CoreRuntime.Core70).WithPlatform(Platform.X64).WithId("Core"))
+                        .AddJob(Job.Dry.WithRuntime(CoreRuntime.Core80).WithPlatform(Platform.X64).WithId("Core"))
                         .AddJob(Job.Dry.WithRuntime(ClrRuntime.Net462).WithId("Framework"))
                         .AddColumnProvider(DefaultColumnProviders.Instance)
                         .AddLogger(new OutputLogger(output)));