remove S3 stratum1 support for now
FIX: integration test 514 for S3
allow for S3 repos in test_functions::create_repo()
FIX: check_catalog_presence() and get_catalog_count()
test adaption for stratum 1s1 on S3
rename get_repo_storage() to get_local_repo_storage()
adapt get_repo_url() to cope with S3 as well