[LMS-557] add: - Database schema 24 and its migration script.

...ource/java/ch/systemsx/cisd/bds/ExperimentIdentifier.java

bds/source/java/ch/systemsx/cisd/bds/SampleWithOwner.java

...urce/java/ch/systemsx/cisd/bds/check/AbstractChecker.java

...rce/java/ch/systemsx/cisd/bds/check/StructureChecker.java

...ceTest/java/ch/systemsx/cisd/bds/SampleWithOwnerTest.java

...java/ch/systemsx/cisd/bds/check/StructureCheckerTest.java

bds/testdata/bds_new_lines/metadata/sample/group_code

bds/testdata/bds_new_lines/metadata/sample/instance_code

bds/testdata/bds_new_lines/metadata/sample/instance_uuid

bds/testdata/bds_ok/metadata/sample/group_code

bds/testdata/bds_ok/metadata/sample/instance_code

bds/testdata/bds_ok/metadata/sample/instance_uuid