GoXDCR: Unable to remove/modify(to use encryption) remote cluster reference (error 500 reason: status: 500, content: revision number does not match)

Build

4.0.0-1913

Testcase
---------
./testrunner -i INI_FILE.ini -t xdcr.pauseResumeXDCR.PauseResumeTest.replication_with_pause_and_resume,items=50000,encrypt_after_pause=C1-C2,rdirection=bidirection,ctopology=chain,standard_buckets=1,expires=20,pause=C1-C2

Steps

1. C1[.3,.4] <--> C2[.67,.20] , default, standard_buckets
2. Load 50K keys into buckets
3. Pause all replications on C1.
4. Modify remote cluster reference to use encryption.

[2015-04-21 18:21:37,281] - [rest_client:833] INFO - modifying remote cluster name:remote_cluster_C1-C2
[2015-04-21 18:22:05,820] - [rest_client:730] ERROR - http://172.23.105.3:8091/pools/default/remoteClusters/remote_cluster_C1-C2 error 500 reason: status: 500, content: revision number does not match
revision number does not match
[2015-04-21 18:22:05,821] - [rest_client:821] ERROR - /remoteCluster failed : status:False,content:revision number does not match
ERROR

I think* this is related to the metakv work that was recently merged by ns_server. Hence assigning to Poonam. Poonam, pls feel free to reassign if that is incorrect.

Attaching log from C1.