Check for consistency of test cases.

[jons-pf]

Add a unit test to check for consistency of input files.

[jons-pf]

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• get the rbsq test to work #34
• update tolerances to get tests to work again #33
• Reduce ftol for solovev_free_bdy #32
• Further testing to narrow down where solovev_free_bdy starts deviating #31
• add reference data for iter2==4 where solovev_free_bdy starts deviating #30
• more tests for solovev_free_bdy case #29
• Enable output tests for solovev_free_bdy #28
• axisymm tests for regint and singint #27
• test set 2 for nestor in solovev_free_bdy #26
• Get 1st nestor test ok for solovev_free_bdy #25
• More test data, needed for nestor in solovev_free_bdy #24
• Step 1 of testing solovev_free_bdy #23
• Document the unit test hierarchy in here. #22
• Check for consistency of test cases. #20 👈 (View in Graphite)
• revive indata tests #21
• Reduce mpol to 6 for solovev_free_bdy to shorten tests #16 : 1 other dependent PR (#15 )
• complete the test data for solovev_free_bdy #14
• main

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