8171981: JShell: Fails compilation: new Object().getClass().getSuperclass()
Reviewed-by: mcimadamore

8144903: JShell: determine incorrectly the type of the expression which is array type of captured type
Summary: Fix and clean-up the processing of types (esp. captured types) into type names for use in generated temp vars
Reviewed-by: mcimadamore, jlahoda, rfield
Contributed-by: bitterfoxc@gmail.com

8134254: JShell API/tool: REPL for Java into JDK9
Summary: Adding the implementation of the jshell (read-eval-print-loop) tool.
Reviewed-by: briangoetz, mcimadamore, psandoz, forax
Contributed-by: robert.field@oracle.com, bitterfoxc@gmail.com, jan.lahoda@oracle.com