[FAB-2600] fix race condition in peer and CouchDB
[FAB-2600] fix race condition in peer and CouchDB

https://jira.hyperledger.org/browse/FAB-2600

Fixing race codition between peer startup and couchDB startup by
updating rety timeouts using a backoff approach,logging warning
messages for retries.

This will fix docker environments where CouchDB and peer start
at same time.

Post-beta, retry logic will be enhanced to allow configurable
retries and allow clients to specify retry behavior, since
eventually we'll want Endorser vs Committer vs peer startup
Verification to use different retry logic.

Change-Id: I340aebe4165d2e2c27433f75b097f1256029e1c6
Signed-off-by: Adnan Choudhury <2218f1043cf31ffb48711119c496b45bcf8d74d1@itpeoplecorp.com>

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