Test pathfinder for initialization with psis_resample=FALSE

[jgabry]

Submission Checklist

• [x] Run unit tests
• [x] Declare copyright holder and agree to license (see below)

Summary

Fixes #976. As pointed out by @wpetry, the test for using pathfinder for inits when psis_resample=FALSE was missing the psis_resample=FALSE.

Copyright and Licensing

Please list the copyright holder for the work you are submitting (this will be you or your assignee, such as a university or company): Columbia University

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• Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
• Documentation: CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)