[FAB-11327] fix wrong error msg in pvtdata e2e test
[FAB-11327] fix wrong error msg in pvtdata e2e test

this change set fix a wrong error msg that was in one of the
private data e2e tests.

FAB-11327 #done

Change-Id: I3b6946144823b0078550fd182c536076dc6e8e77
Signed-off-by: nirro <3e3e316b6b4efbc83ce3ce6ac4445c3d2118b623@il.ibm.com>

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