8136930: Simplify use of module-system options by custom launchers
8160489: Multiple -Xpatch lines ignored by javac
8156998: javac should support new option -XinheritRuntimeEnvironment
Reviewed-by: jlahoda, ksrini

8133671: langtools tests have bad license
Summary: Dropped classpath exception from copyright notice in tests.
Reviewed-by: jjg

8046824: class SJavacTestUtil and *Wrapper are redundant and should be removed
Reviewed-by: ksrini