Description of problem:
Manifest while that contains information of swift large object segments does not sync. 

Version-Release number of selected component (if applicable):
ceph-radosgw-10.2.5-22.el7cp.x86_64

How reproducible:
Always

Steps to Reproduce:
1 Configure multisite with three zones in different clusters.
2. Segment a large object and upload the segments to a container using the following command on one of the zones.
# curl -v -X PUT -H "X-Auth-Token: AUTH_rgwtk0a000000757365723a73776966740b720d95a8ec973269a1a2585263181296489905c5add9565c4b6ff038cbd6f2dedfeb0a" -T segaa http://rgw:8080/swift/v1/current/segaa

3. Upload a manifest file.
 curl -v -X PUT -H "X-Auth-Token: AUTH_rgwtk0a000000757365723a73776966740b720d95a8ec973269a1a2585263181296489905c5add9565c4b6ff038cbd6f2dedfeb0a" "http://rgw:8080/swift/v1/current/random?multipart-manifest=put" -T manifest.json

# cat manifest 
[
 { "path": "new/segaa",
   "etag": "b5569ee4b2bd227f202ccf3daf036b60",
   "size_bytes": 2097152
 },
 { "path": "new/segab",
   "etag": "9df301504ca3437f5244d781d33e7574",
   "size_bytes": 2097152
 },
 { "path": "new/segac",
   "etag": "87b6f0f47900d129d93b049caee7f724",
   "size_bytes": 2097152
 },
 { "path": "new/sagad",
   "etag": "1035d04ee5f8d231ec64739d41587233",
   "size_bytes": 2097152
 }
]

4. # swift -A http://rgw:8080/auth/1.0 -U user:swift -K 'uYh9A94G2xF6CHZujkcAYpjK4NAJJR25LwlBfWxc' list current
random
segaa
segab
segac
segad

5. Check if the large object 'random' has synced to all zones

Actual results:
The file 'random' which is the manifest file does not sync to the other zones. Only the segments sync. Hence there is no way to retrieve the full object from a different zone.