FunctionalTest.kt

Currently, the primary obstacles for us to improve CI feedback time is the long-running jobs: `integTest`/`core`/`dependencyManagement` each takes more than 10 minutes. Without decreasing the time we can't improve CI feedback time.

This PR changes the previous subproject-based TC job to bucket-based TC job: a bucket can contain a split of large subproject, or many tiny subprojects. This makes CI configuration more flexiable and efficient.

For example, all tiny subprojects which only contain unit tests can be merged to `AllUnitTests`, just as before - but now we make this more generic.

`integTest` subproject can be split to 3 jobs: `integTest`/`integTest_2`/`integTest_3`. Splitted project has a special parameter `-PtestSplit=1/3`/`-PtestSplit=2/3`/`-PtestSplit=3/3` so the build can choose only a subset of tests to execute.

Merging again now that build types can be invoked for subprojects.

This reverts commit 4636d4f056b108ae70e9600c0a111018b292ddfe.

So we don't have so many small build types. The unit tests should run

very fast anyway.

This is the followup of https://github.com/gradle/gradle/pull/8470 : there're two issues unresolved:

- `GRADLE_RERUNNER` is configured to `Gradleception`/`compileAll`/`sanityCheck`, etc. , which makes no sense.

- We want to skip `GRADLE_RERUNNER` if there're too many failures.

This PR does:

- Extract another function `applyTestDefaults` in addition to `applyDefaults`. Functional test build and smoke test build apply `applyTestDefaults`.

- Slightly refactor `applyDefaults` function.

- Add unit tests for `applyTestDefaults`/`applyDefaults`.

- Switch to JUnit 5 for `.teamcity` project.

- Ignore the rerun if test failures are > 10.

See https://github.com/gradle/gradle-private/issues/1767

Previously we disabled daemon in some CI builds as a workaround of https://github.com/gradle/gradle-private/issues/1352 . Now that issue has been fixed, so we re-enable disabled daemons.

Also, there seems no reason to enable daemon in performance tests, so we enable them as well.

This PR does:

- Switch build JDK from Oracle JDK 9 to OpenJDK 11.

- Remove all unnecessary java7Home and java9Home system properties.

In https://github.com/gradle/gradle/pull/6106 we disabled daemon for some certain

subprojects, however, all subprojects' `noDaemonTest` requires allDistribution, which

in turn invokes userguide task. This PR disabled daemon for `noDaemonTest`, given that

noDaemonTest is excuted once a day.

This is a follow-up of https://github.com/gradle/gradle-private/issues/1352. The asciidoctor plugin

we're using has a serious issue that its native library sometimes cause the daemon JVM crash.

As a workaround, we identify the following builds need to run `docs:docs` task because they depend on

`binZip` task:

- wrapper

- toolingApi

- distributions

- performance test coordinators because they're running in the default pool

This commit disables daemon by removing `--daemon` from build parameter list. (TeamCity would automatically

add `-Dorg.gradle.daemon=false` at the end of the parameter list.)

This reverts commit 84c4874bfac6e29b9d2f15319d8c118a913edff7.

Previously we always use Java 8 as the bootstrap JVM. To migrate to Java 9,

this PR adds a configuration of "build JVM version" with default version Java 8.

Experiemental pipeline is also set to Java 9 to verify migration work.