Allow test projects to run standalone (#7144)

...r.IntegrationTesting/src/Deployers/ApplicationDeployer.cs

...rs/IIS/IIS/test/Common.FunctionalTests/AppOfflineTests.cs

...ers/IIS/IIS/test/Common.FunctionalTests/BasicAuthTests.cs

...IIS/IIS/test/Common.FunctionalTests/CommonStartupTests.cs

...S/test/Common.FunctionalTests/ConfigurationChangeTests.cs

...Servers/IIS/IIS/test/Common.FunctionalTests/HttpsTests.cs

...mon.FunctionalTests/Inprocess/EnvironmentVariableTests.cs

.../test/Common.FunctionalTests/Inprocess/ErrorPagesTests.cs

...IS/test/Common.FunctionalTests/Inprocess/EventLogTests.cs

...IS/IIS/test/Common.FunctionalTests/Inprocess/FrebTests.cs

.../test/Common.FunctionalTests/Inprocess/HelloWorldTests.cs

...IIS/test/Common.FunctionalTests/Inprocess/LogPipeTests.cs

...IS/test/Common.FunctionalTests/Inprocess/ShutdownTests.cs

...Common.FunctionalTests/Inprocess/StartupExceptionTests.cs

...IIS/test/Common.FunctionalTests/Inprocess/StartupTests.cs

...rvers/IIS/IIS/test/Common.FunctionalTests/LogFileTests.cs

.../IIS/test/Common.FunctionalTests/MultiApplicationTests.cs

...ommon.FunctionalTests/OutOfProcess/AspNetCorePortTests.cs

...Common.FunctionalTests/OutOfProcess/GlobalVersionTests.cs

...t/Common.FunctionalTests/PublishedApplicationPublisher.cs