[FAB-4475] Sync gossip ledger height & metastate
[FAB-4475] Sync gossip ledger height & metastate

The state transfer asks the ledger what is its ledger height, but
compares the height to the maximum block number of the peers of the channel
which is always 1 behind the ledger height, since block sequence of 0
means ledger height of 1.

Change-Id: If7ff1ad56ae765c8cdadf9b9725dc18a05b49691
Signed-off-by: Yacov Manevich <632344b5da9bd743456189af4db4b56472defb8c@il.ibm.com>

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