Correctly handle resurrected documents

It's a similar code path to updateRevision, sync-android isn't very clever so you have to explicitly mark non-leaf nodes as not being current.

Without this line we get:
```
java.lang.IllegalStateException: The number of document does not match number of ids, something must be wrong here.
	at com.cloudant.sync.datastore.BasicDatastore.changes(BasicDatastore.java:284)
	at com.cloudant.sync.replication.BasicPushStrategy.getNextBatch(BasicPushStrategy.java:217)
	at com.cloudant.sync.replication.BasicPushStrategy.replicate(BasicPushStrategy.java:171)
	at com.cloudant.sync.replication.BasicPushStrategy.run(BasicPushStrategy.java:119)
	at java.lang.Thread.run(Thread.java:695)
```