[LMS-2163] Screening Well Search: display one row for each well

.../web/client/application/detailviewers/WellSearchGrid.java

...ugin/screening/client/web/server/WellContentProvider.java

...s/plugin/screening/server/dataaccess/IScreeningQuery.java

...n/screening/server/dataaccess/WellContentQueryResult.java

...enbis/plugin/screening/server/logic/ScreeningApiImpl.java

...nbis/plugin/screening/server/logic/WellContentLoader.java

...penbis/plugin/screening/shared/basic/dto/WellContent.java

...ening/shared/basic/dto/grids/WellSearchGridColumnIds.java

.../plugin/screening/server/dataaccess/ScreeningDAOTest.java

.../plugin/screening/server/logic/WellContentLoaderTest.java