Continuation of Encounter Search (using OpenSearch)

[naknomum]

fixes #511

remainder of work for search: frontend:

• encounter search page
• link to legacy jsp using stored queries
• a whole bunch more i cant even guess

backend:

• introduce stored queries, various additions to support
• hack into EncounterQueryProcessor and friends to use stored queries
• many more fields added for Encounters
• proper keyword-indexing where needed with custom normalization to handle case-insensitivity
• fixes for linked objects forcing re-indexing of encounters when changed/deleted
• proper count of annotations
• disable PIT complexity for further development
• many more OpenSearch class utilities
• created background indexing behavior
• index mapping additions/improvements
• improvements to pagination and sorting
• improvements on search permissions (per user)

[holmbergius]

Thanks @naknomum for the query change.