[windows] online upgrade from 2.0.0 to 3.0.1 and reboot cluster: one vbucket fails to warmup

Install couchbase server 2.0.0 on 2 nodes (248 and 249)
Create a cluster of 2 ndoes and create default bucket
Load 1000 keys to default bucket

Install couchbase server 3.0.1-1444 on 2 other nodes (250 and 251)
Add 2 3.0.1 nodes to 2.0.0 cluser and rebalance. Passed
Remove 2 2.0.0 nodes (248 and 249) out of cluster and rebalance. Passed
DCP upgrade rebalance. Passed
Restart couchbase server on all nodes of 3.0.1 cluster (250 and 251)
After warmup, 2 replica keys are lost.

Live cluster available for debug at

ip:172.23.105.248
ip:172.23.105.249

ip:172.23.105.250
ip:172.23.105.251

Due to jira failed to attach the file, I will put them in cbfs and add the link later for cbcollectinfo