GEODE-10366: Cleanup GfshRule created Folder

[kirklund]

PROBLEM

Tests using GfshRule default constructor do not delete the contents
of the internal Folder created by GfshRule when all tests passed. This
results in unnecessary size bloating of the archive file.

SOLUTION

Ensure that GfshRule handles Folder policy and invokes delete when
appropriate.

[onichols-pivotal]

Thanks for opting-in to automated commit message feedback via COMMITWATCHERS. https://cwiki.apache.org/confluence/display/GEODE/Commit+Message+Format suggests that your first commit additional detail paragraph(s) should describe the problem and how this change solves it.

These suggestions are totally optional. What matters is including enough detail for future contributors to understand what you intended and why.

[onichols-pivotal]

due to code freeze, please hold off merging this