8171371: Remove redundant type-arguments from generic method calls
Reviewed-by: jjg, rfield, mchung

8156101: JShell SPI: Provide a pluggable execution control SPI
Reviewed-by: jlahoda

8152925: JShell: enable corralling of any type declaration, including enum
Reviewed-by: jlahoda

8080069: JShell: Support for corralled classes
Reviewed-by: jlahoda