SSDM-555: Table 'database_instances' removed from schema, DatabaseInstancePE removed

.../ch/systemsx/cisd/etlserver/SampleRegisteringDropbox.java

...tityregistration/SampleAndDataSetRegistrationHandler.java

.../cisd/openbis/dss/generic/server/DssServiceRpcV1Test.java

...cisd/openbis/dss/generic/server/UploadingCommandTest.java

...isd/openbis/generic/server/ServiceForDataStoreServer.java

...neric/server/authorization/AuthorizationDataProvider.java

...eric/server/authorization/IAuthorizationDataProvider.java

...nbis/generic/server/authorization/RoleWithIdentifier.java

...rization/predicate/DeletionTechIdCollectionPredicate.java

...horization/predicate/SampleTechIdCollectionPredicate.java

...ric/server/authorization/validator/DeletionValidator.java

...is/generic/server/business/bo/AbstractBusinessObject.java

...eric/server/business/bo/AbstractSampleBusinessObject.java

...r/business/bo/AbstractSampleIdentifierBusinessObject.java

...nbis/generic/server/business/bo/AuthorizationGroupBO.java

...cisd/openbis/generic/server/business/bo/EntityTypeBO.java

...enbis/generic/server/business/bo/RoleAssignmentTable.java

...emsx/cisd/openbis/generic/server/business/bo/SpaceBO.java

...penbis/generic/server/business/bo/common/AbstractDAO.java

.../server/business/bo/common/entity/SecondaryEntityDAO.java