Full-text / keyword search

[tdddblog]

Summary
See https://github.com/NASA-PDS/pds-api/issues/99

Test instructions

• Build and install latest pds-api-javalib (on "swaggerhub-pds_federated_api-keywords" branch if it is not merged into main)
• Build latest registry-api-service
• Build latest Harvest (on "keyword" branch if it is not merged into main)
• Build latest Registry Manager (on "keyword" branch if it is not merged into main)
• Delete old registry
• Create new Registry
• Harvest some data
• Load harvested data into registry with Registry Manager
• Search for some keywords from "title" or "description" fields.