Use attribute object to store search values : need to be generalized

...a/ch/dlcm/controller/access/AipDownloadAipController.java

...dlcm/controller/access/AipDownloadDataFileController.java

...java/ch/dlcm/controller/access/DipDataFileController.java

...in/java/ch/dlcm/controller/access/OrderAipController.java

...in/java/ch/dlcm/controller/access/OrderDIPController.java

...ller/admin/FundingAgencyOrganizationalUnitController.java

...roller/admin/InstitutionOrganizationalUnitController.java

...ch/dlcm/controller/admin/InstitutionPersonController.java

...ller/admin/OrganizationalUnitFundingAgencyController.java

...roller/admin/OrganizationalUnitInstitutionController.java

...ch/dlcm/controller/admin/PersonInstitutionController.java

.../ch/dlcm/controller/archivalstorage/AipAipController.java

...lcm/controller/archivalstorage/AipDataFileController.java

...c/main/java/ch/dlcm/controller/AssociationController.java

...c/main/java/ch/dlcm/controller/CompositionController.java

...c/main/java/ch/dlcm/controller/SubResourceController.java

DLCM-Common/src/main/java/ch/dlcm/rest/RESTRepository.java

...java/ch/dlcm/controller/ingest/SipDataFileController.java

...-Model/src/main/java/ch/dlcm/attribute/DLCMAttribute.java

...el/src/main/java/ch/dlcm/attribute/DataFileAttribute.java