8157957: ClassNotFoundException: jdk.test.lib.JDKToolFinder
Reviewed-by: coleenp, gtriantafill, mseledtsov, iignatyev, dholmes, dsamersoff

8142385: [Testbug] RandomCommandsTest fails with error: Could not parse method pattern
Summary: Fix CompileCommand output processing
Reviewed-by: kvn, iignatyev, neliasso

8140453: compiler control test failed with RuntimeException: CompileCommand: nonexistent missing
Summary: Replace incorrect check for validity of method pattern with full command check
Reviewed-by: kvn

8066153: JEP-JDK-8046155: Test task: cover existing
Summary: Tests for CompilerCommand and CompilerControl's directives
Reviewed-by: kvn