Keep average PDCI in FaoInstitute

Maintain average PDCI score in FaoInsitute entity.

Add Double fields pdciMin, pdciMax, pdciAvg to FaoInstitute (update liquibase).

These values should be updated in the org.genesys2.server.service.worker.AccessionCounter method process:

FaoInstitute institute = instituteService.findInstitute(forProcessing.getObj());
if (institute != null) {
	LOG.info("Updating count for {}", institute.getCode());
	genesysService.updateAccessionCount(institute);
        // Add
	genesysService.updatePDCI(institute);
}

Implement method genesysService.updatePDCI(FaoInstitute) based on genesysService.statisticsPDCI(FaoInstitute).

Remove method genesysService.statisticsPDCI(FaoInstitute) and refactor code to use the numbers stored in FaoInstitute entity. This means fix the code in genesysService.statisticsPDCI(Organization) -- just use numbers from the entity, don't query the database. You will need to use institute.accessionCount instead of (Long) overall[3] (which contains the count).

Update mvc.AccessionController and remove the call to statisticsService, use values from institute in the JSP.