Master runtime functional tests (GoogleCloudPlatform#61)

* Adding test for .NET Core 1.0 apps.

* Remove the extra bins.

* Use the fake binaries to run builder tests.

* Adding integration tests.

* Creating new test app.

* Renaming to final name.

* Adding test for .NET Core 1.1

* Adding config files.

* Cleaning the app.

* Removing bad test.

* Adding the 1.1 integration tests.

* Refactoring how the images are built.

With this change the images for a particular .NET Core version are all
built at once in a single build. This will allow us to send test code
to the build so we can run tests during the build.

This change also makes it building multiple images faster, as they all
can be built at the same time.

* Refactoring the builder build.

* MAke the build of the builder image in parallel.

* Remove unused tools.

* Making the test-1.0 fully compliant.

* Enable full testing on .NET Core 1.0 runtime.

* Preparing .NET Core 1.1 image to be tested.

* Updating the README.md for the new structure.

* Updating main README.md

* Update the README.md for the runtime builder.

* Adding instructions on how to use the runtime builder.

* Create README.md

* Create README.md

* Update README.md

* Adding the funcitonal test.

* Adding simple app to verify .NET Core 1.0.

* Fixing the generator.

* Ensuring we're using a 1.0 app.

* Adding running the test, even if it fail right now.

* Using full path to start test app.

* Create section to test 1.0.5 runtime.

* Adding missing file.

* Adding the functional tests for each supported runtime.

* Add the functional tests for the 1.0 runtime.

* Update the generator.

* Run functional tests for 1.0.3, 1.0.4 and 1.0.5 runtimes.

* Moving and reorganzing tests.

* Centralizing the script to run tests.

* Removed unnecessary files.

* Adding the tests for the 1.1 runtime.

* Adding functional tests for the 1.1 runtime.

* Create README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

Author: ivannaranjo

.gitignore

@@ -5,3 +5,9 @@
 .DS_Store
 tests/apps/*/obj
 tests/apps/*/bin
+runtimes/aspnetcore-1.0/functional_tests/apps/*/obj
+runtimes/aspnetcore-1.0/functional_tests/apps/*/bin
+runtimes/aspnetcore-1.1/functional_tests/apps/*/obj
+runtimes/aspnetcore-1.1/functional_tests/apps/*/bin
+integration_tests/apps/*/obj
+integration_tests/apps/*/bin