[Gradle] Explicitly assign JavaLauncher for tests.

Author: vyazelenko

build.gradle

@@ -215,6 +215,8 @@ subprojects {
  testLogging.events = ["FAILED", "STANDARD_OUT", "STANDARD_ERROR"]
  }
  }
+
+ javaLauncher.set(toolchainLauncher)
  }
 }