Issue-240: Add Method Property to schemas.

Type of change

• Bug Fix
• Feature

Does this introduce a change in the core logic?

• [No]

Does this introduce a change in the cloud provider implementation, and if so which cloud?

• AWS
• Azure
• GCP
• IBM

Does this introduce a change that must be documented in the README.md file?

• [No]

Updates description?

• Add Method (GeochemistryMethod) property to geochemistry contentn schemas:

  • Extraction
  • Fractionation
  • Gasoline Gas Chromatography
  • Whole Oil Gas Chromatography
  • GCMS Alkanes
  • GCMS Aromatics
  • GCMS Ratios
  • Physical Chemistry
  • GasComposition

• Update test data

• Add GeochemistryMethod reference data schema

• Upload GeochemistryMethod reference values

  glab_GeochemistryMethod.json

• Closes issue #240 (closed)