Troubleshoot domainvalues internalref

[hillarymarler]

Bug fix so that a domain value can be entered without specifying "domain =" in the function. This no longer worked after adding an api_key param.

Moved test mocks into testthat folder and updated all required code to support that.

[github-actions]

coverage-report

File	Coverage		Missing
All files	80%	✅
R/EQ_Actions.R	95%	✅	90
R/EQ_ActionsDocuments.R	95%	✅	75
R/EQ_Assessments.R	95%	✅	201
R/EQ_AssessmentUnits.R	95%	✅	56
R/EQ_AUsMLs.R	95%	✅	65
R/EQ_CatchCorr.R	95%	✅	56
R/EQ_DomainValues.R	43%	✅	80 99 101 103 107-122 134 187-292
R/EQ_HelperFunctions.R	87%	✅	75 143 321-322 324-325 338-344 381-389 404 414-416
R/EQ_NationalExtract.R	92%	✅	94 102 121 197-198 200-201 206 253
R/EQ_Sources.R	95%	✅	77
R/EQ_TMDLs.R	95%	✅	115

Minimum allowed coverage is 10%

Generated by 🐒 cobertura-action against c56af00