Consul KV PUT is not working in cross datacenter setup

## Consul KV put is not working in cross datacenter setup
When I tried to put a KV from the datacenter A consul-client to datacenter B consul cluster, Im seeing below permission error. But I have given enough permissions for all the datacenter consul clusters

#### Reproduction Steps

Steps to reproduce this issue, eg:

gave below permission in both datacenter A and datacenter B consul clusters
```
agent_prefix "" {
policy = "read"
}
node_prefix "" {
policy = "read"
}
service_prefix "" {
policy = "read"
}
query_prefix "" {
policy = "read"
}
key_prefix "test_path/" {
policy = "write"
}
```

Below is the error I got when i tried to put a KV from the datacenter A consul-client to datacenter B consul cluster,
```
+ consul kv put -datacenter=datacenterB "test_path/test_key" "test_value"
Error! Failed writing data: Unexpected response code: 403 (rpc error making call: rpc error making call: ACL not found)
```

No source files, tests, or entry points are mentioned. Start by reproducing the shown consul kv put command with the supplied ACL policy across datacenter A and datacenter B, then trace the cross-datacenter ACL handling; done means the permitted KV write succeeds without the 403 ACL-not-found error.

Written by the indexing model from the issue text.