[SUREFIRE-2045] Use Verifier in embedded mode

**[Slawomir Jaranowski](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=slawekjaranowski)** opened **[SUREFIRE-2045](https://issues.apache.org/jira/browse/SUREFIRE-2045?redirect=false)** and commented

embedded mode can improve test time executing
if some of tests need fork mode can be used in a few selected

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No further details from [SUREFIRE-2045](https://issues.apache.org/jira/browse/SUREFIRE-2045?redirect=false)

Start by reading SUREFIRE-2045 and the issue description's distinction between embedded mode and fork mode. Identify the existing Verifier entry point and how selected tests are assigned to fork mode. Done means the requested embedded-mode execution behavior is defined and covered by tests.

Written by the indexing model from the issue text.