Fix ekv Memstore initializations

cmix/identity/receptionID/registration_test.go

fileTransfer/manager_test.go

fileTransfer/store/cypher/manager_test.go

fileTransfer/store/receivedTransfer_test.go

fileTransfer/store/received_test.go

fileTransfer/store/sentTransfer_test.go

fileTransfer/store/sent_test.go

storage/utility/knownRounds_test.go