Update develop-ref after #810

[georgemccabe]

PR #804 for issue #803 changed the size of the dots on the output images of met_tool_wrapper/CyclonePlotter/CyclonePlotter.conf. Newly added regression testing (PR #810) caught this difference.

Pull Request Testing

• Describe testing already performed for these changes:
  
  We discussed in the METplus meeting (2/18/2021) that the new image is the desired output, so we are updating the reference branch to include these changes.

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  

None needed

• Do these changes include sufficient documentation and testing updates? [Yes]

• Will this PR result in changes to the test suite? [Yes]
  

The reference data volumes will be updated so that future pull requests will use that data to compare output.

Pull Request Checklist

See the METplus Workflow for details.

• Complete the PR definition above.
• Ensure the PR title matches the feature or bugfix branch name.
• Define the PR metadata, as permissions allow.
  Select: Reviewer(s), Project(s), and Milestone
• After submitting the PR, select Linked Issues with the original issue number.
• After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• Close the linked issue and delete your feature or bugfix branch from GitHub.