FAB-14909 more lenient timeout for integration test
FAB-14909 more lenient timeout for integration test

Etcdraft integration tests suffer quite a lot from slow disk
fsync, especially at channel creation.

This CR increases peer timeout to 15 seconds for channel creation
to reduce flakiness.

Change-Id: I58ef5206fa212b0b10f9ddcdc6b535c8b00c8084
Signed-off-by: Jay Guo <91d7eeb83d08be0dc56ea674009c4b53383e15b3@gmail.com>

stemlending/fabric,manish-sethi/fabric,manish-sethi/fabric-sidedb,muralisrini/fabric,stemlending/fabric,stemlending/fabric,stemlending/fabric,muralisrini/fabric,hyperledger/fabric,binhn/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric,binhn/fabric,hyperledger/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,muralisrini/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric,binhn/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,manish-sethi/fabric-sidedb