[TASK] Check more locations for test data files

[j-bryan]

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Issue Description

Is your feature request related to a problem? Please describe.
The FORCE standalone installation contains some HERON examples and the accompanying SyntheticHistory/ARMA ROM files. However, the %HERON_DATA% default location is not easily accessible to users for this installation type. Adding another location to check for these files would facilitate a better user experience for those using the standalone installation and wishing to run the included examples.

Describe the solution you'd like
Add an additional location to check for the data directory currently located in HERON's root directory.

Describe alternatives you've considered
Edit the example HERON case files to point directly to the included ROMs. However, this presents more difficulties when copying selected tests to the FORCE build package.

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For Change Control Board: Issue Review

This review should occur before any development is performed as a response to this issue.

• 1. Is it tagged with a type: defect or task?
• 2. Is it tagged with a priority: critical, normal or minor?
• 3. If it will impact requirements or requirements tests, is it tagged with requirements?
• 4. If it is a defect, can it cause wrong results for users? If so an email needs to be sent to the users.
• 5. Is a rationale provided? (Such as explaining why the improvement is needed or why current code is wrong.)

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For Change Control Board: Issue Closure

This review should occur when the issue is imminently going to be closed.

• 1. If the issue is a defect, is the defect fixed?
• 2. If the issue is a defect, is the defect tested for in the regression test system? (If not explain why not.)
• 3. If the issue can impact users, has an email to the users group been written (the email should specify if the defect impacts stable or master)?
• 4. If the issue is a defect, does it impact the latest release branch? If yes, is there any issue tagged with release (create if needed)?
• 5. If the issue is being closed without a pull request, has an explanation of why it is being closed been provided?

[dylanjm]

Approved to close via #360