functional_tests: reset blockchain on test start

tests/functional_tests/wallet_address.py

@@ -39,9 +39,11 @@ Test the following RPCs:
 """
 
 from framework.wallet import Wallet
+from framework.daemon import Daemon
 
 class WalletAddressTest():
     def run_test(self):
+      self.reset()
       self.create()
       self.check_main_address()
       self.check_keys()
@@ -49,6 +51,12 @@ class WalletAddressTest():
       self.open_close()
       self.languages()
 
+    def reset(self):
+        print 'Resetting blockchain'
+        daemon = Daemon()
+        daemon.pop_blocks(1000)
+        daemon.flush_txpool()
+
     def create(self):
         print 'Creating wallet'
         wallet = Wallet()