Unnecessary suggestion in on-demand import statements

[ShinyaYoshida]

Hi.

I found the unnecessary suggestion bug in on-demand import statements:

-> import java.util.*[TAB]Display all 114 possibilities? (y or n)

REPL shouldn't print any suggestion in on-demand import statements.

Here is the fix & test:
http://cr.openjdk.java.net/~shinyafox/kulla/20153291/webrev.00/

Regards,
shinyafox(Shinya Yoshida)