RFR 8173232/8173234/8173204 -- ProblemList fixes/updates

[Robert Field]

Please review...

Bugs:

     8173232: JShell test: ReplaceTest takes too long
     https://bugs.openjdk.java.net/browse/JDK-8173232
     break up the too big test into three

     8173234: JShell tests: remove from ProblemList 
jdk/jshell/ToolFormatTest.java
     https://bugs.openjdk.java.net/browse/JDK-8173234
     the underlying problem was fixed, the ProblemList entry should be 
removed

     8173204: JShell tests: ProblemList 
jdk/jshell/UserJdiUserRemoteTest.java
     https://bugs.openjdk.java.net/browse/JDK-8173204
     this one does fail intermittently because JDI fails intermittently 
and this doesn't (by definition) have failover

Webrev:

    http://cr.openjdk.java.net/~rfield/8173232v0.webrev/

Thanks,
Robert