Restore data folder from Globals in tests

[Martin-Molinero]

Description

Minor test refactor: tests that temporarily point the data folder somewhere else (SymbolPropertiesDatabaseTests, RandomDataGeneratorTests) now save the original value from Globals.DataFolder instead of reading the data-folder config key again.

Globals.DataFolder is the data folder actually in use, including the default when the key isn't set. Restoring from it puts the global state back the way it was, so later tests in the same run aren't affected.

Related Issue

N/A

Motivation and Context

Makes the save/restore in these tests independent of how the config value is resolved, so they can't leave a different data folder behind for later tests.

Requires Documentation Change

No

How Has This Been Tested?

Ran SymbolPropertiesDatabaseTests and RandomDataGeneratorTests together with the regression tests that run after them (RunRemoveConsolidatorsRegressionAlgorithm, IncrementalOrderId): 62/62 pass.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Refactor (non-breaking change which improves implementation)
• Performance (non-breaking change which improves performance. Please add associated performance test and results)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Non-functional change (xml comments/documentation/etc)

Checklist:

• My code follows the code style of this project.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My branch follows the naming convention bug-<issue#>-<description> or feature-<issue#>-<description>

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