[SUREFIRE-1592] Forked JVM should load classes in Isolated ClassLoader if useSystemClassLoader=false

**[Tibor Digana](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=tibor17)** opened **[SUREFIRE-1592](https://issues.apache.org/jira/browse/SUREFIRE-1592?redirect=false)** and commented

The Surefire project runs itself tests within `maven-surefire-plugin:2.12.4` which properly isolates project classes and plugin's classes. The current versions 2.x do not have this ability. The version `3.0.0` should load user's classes in `IsolatedClassLoader` (configured by `useSystemClassLoader=false`).

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No further details from [SUREFIRE-1592](https://issues.apache.org/jira/browse/SUREFIRE-1592?redirect=false)

No source files or tests are identified in the issue. Start by tracing how the forked JVM handles useSystemClassLoader=false and how user classes are currently loaded. Done means version 3.0.0 loads those user classes through IsolatedClassLoader while preserving plugin class isolation.

Written by the indexing model from the issue text.