fix replication validation for Role ARN

[poornas]

updating replication rule with deprecated Role ARN fails with "invalid destination bucket for this rule"

repro:

{
 "Rules": [
  {
   "ID": "cptjg0rkru7aqane8md0",
   "Status": "Enabled",
   "Priority": 0,
   "DeleteMarkerReplication": {
    "Status": "Enabled"
   },
   "DeleteReplication": {
    "Status": "Enabled"
   },
   "Destination": {
    "Bucket": "arn:aws:s3:::bucket"
   },
   "Filter": {
    "And": {},
    "Tag": {}
   },
   "SourceSelectionCriteria": {
    "ReplicaModifications": {
     "Status": "Enabled"
    }
   },
   "ExistingObjectReplication": {
    "Status": "Disabled"
   }
  }
 ],
 "Role": "arn:minio:replication::090575fd-f689-4cfa-8a5a-5712c55825b2:bucket"
}

mc replicate update sitea/bucket --id cptjg0rkru7aqane8md0 --remote-bucket http://"${remote_access_key}:${remote_secret_key}"@localhost:9000/bucket
mc: <ERROR> unable to modify replication rule: invalid destination bucket for this rule.

[harshavardhana]

=== RUN   TestAddReplicationRule
--- PASS: TestAddReplicationRule (0.00s)
=== RUN   TestEditReplicationRule
Error:     replication_test.go:347: Test 1: Expected invalid destination bucket for this rule, got %!s(<nil>)
--- FAIL: TestEditReplicationRule (0.00s)