Perform testing on CPS Core read (get and query) operations.

Update CPS-Core Read & Write (large load) Test Results with results.

• Tests run using test data from CPS-Core Read & Write (large load) Test Results
• TBD which operations to be tested?
  • REST (Postman manual test, scripts to generate data)
    • Include data conversion and REST overhead, parallelism
    • org.onap.cps.rest.controller.DataRestController#getNodeByDataspaceAndAnchorV2
    • org.onap.cps.rest.controller.QueryRestController#getNodesByDataspaceAndAnchorAndCpsPathV2
  • Java (smaller more detailed parts of function)
    • Use the (new) performance-integration module
    • Insert dat in the (base)test
    • Prefer to use 'bookstore' and/or Ahila's model & Data

A/C:

1. Add Prometheus instrumentation for get and query controller methods and 'significant' ri-methods involved in these use cases
2. Report measurement and share with team
   1. consider root v. non-root scenarios
   2. consider parallel client requests 
   3. consider leaf-condition query (or cpsPath query functionality is not yet in scope)
3. Report suspect bottlenecks

Additional Tasks

1. Create Base Performance Test using Ahila's Data by extending integration-test/src/test/groovy/org/onap/cps/integration/base/CpsIntegrationSpecBase.groovy
2. Create & Document PostMan REST collection