DurabilityLevelNotAvailableException on inserting doc with DurabilityLevel.MAJORITY in a 2 nodes cluster with replica=1

NOTE: This is tried with java SDK alpha2

Steps to Reproduce:
1. Create a 2 node cluster and a default bucket with replicas=1
2. Try to insert a document with DurabilityLevel.MAJORITY
3. Observe that server returns DurabilityLevelNotAvailableException

Expected Result:
As the durability requirements are met the document should be inserted into the bucket without any error

Actual Result
DurabilityLevelNotAvailableException is thrown on inserting the document. PCAP is attached.