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kotlinlang

Hey guys,

I'm trying to get the `kotlin-compiler` (branch `1.3.30`) running in a composite build and I could use some help :slightly_smiling_face:

`settings.gradle.kts` (I use Gradle 5.2.1, Kotlin 1.3.21)
```
includeBuild("../kotlin") {
	dependencySubstitution {
		substitute(module("org.jetbrains.kotlin:kotlin-compiler")).with(project(":include:kotlin-compiler"))
	}
}
```

*Create separate module per source set* is *disabled* (IDEA-181187)
*Delegate IDE build/run actions to gradle* is *enabled*

Now trying to build one of my project's modules from IntelliJ IDEA:
```
Could not determine the dependencies of task ':fluid-json-annotation-processor:compileTestJava'.
&gt; Could not resolve all task dependencies for configuration ':fluid-json-annotation-processor:testCompileClasspath'.
   &gt; Could not find org.jetbrains.kotlin:util:1.3.21.
     Searched in the following locations:
         (my own project's repos here)
     Required by:
         project :fluid-json-annotation-processor &gt; org.jetbrains.kotlin:kotlin-bom:1.3.21 &gt; project :kotlin:include:kotlin-compiler
(… and way more)
```

For some reason Gradle only uses my project's `repositories` to resolve `kotlin-compiler`'s dependencies rather than the repositories defined in the `kotlin` Gradle project.

Is that a quirk with Gradle composite builds or is that expected?