Merge pull request #5861 from superbaud/smoketests-walletrequirebackup

add walletrequirebackup=false to the zcash argument list in smoke_tests.py

qa/zcash/smoke_tests.py

@@ -583,6 +583,7 @@ class ZcashNode(object):
             '-showmetrics=0',
             '-experimentalfeatures',
             '-zmergetoaddress',
+            '-walletrequirebackup=false'
         ]
         if self.__testnet:
             args.append('-testnet=1')