RFR 8143952: JShell: space in class path causes remote launch failure

[Jan Lahoda]

Hello,

Bug:
https://bugs.openjdk.java.net/browse/JDK-8143952

Problem: when running the RemoteAgent (the process in which the user's 
code is being run), a problem occurs if the -classpath or 
-Xbootclasspath/p: argument contains a space, as the spaces are not 
properly quoted.

We currently construct a "connection spec" string in ExecutionControl, 
and then parse it in JDIConnection to construct connector arguments. So 
we would need to keep some kind of quoting through this process. This 
seems a little bit unnecessary - why not pass the arguments as a map 
(with proper quoting of the values in the map), avoiding the parsing?

Patch that implements this:
http://cr.openjdk.java.net/~jlahoda/8143952/webrev.00/

Thanks to Robert and Maurizio for their comments so far on the patch.

Any feedback is welcome.

Thanks!

Jan