openstack-swift provider mangles blob names that end with slash

@Test
public void testListObjectWithTrailingSlash() throws InterruptedException {
       BlobStore blobStore = view.getBlobStore();
       String containerName = getContainerName();
       try {
           String key = "a/";
           String etag = blobStore.putBlob(containerName,
                   blobStore.blobBuilder(key).payload("content").build());
           assertThat(etag).isNotNull();
           PageSet<? extends StorageMetadata> res =
                   blobStore.list(containerName, new ListContainerOptions().recursive());
           assertThat(res).hasSize(1);
           StorageMetadata meta = res.iterator().next();
           assertThat(meta.getName()).isEqualTo(key);
       } finally {
           returnContainer(containerName);
       }
   }