[FAB-12218] cache config to avoid racing in test
[FAB-12218] cache config to avoid racing in test

Change-Id: If235a1cb7a678569285b6d4678cc6f4fb7a98108
Signed-off-by: Matthew Sykes <89c6e4c9c1046731a9c37abefc223a83de36a5d9@us.ibm.com>

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