scripted-diff: Use new create_block height option

-BEGIN VERIFY SCRIPT-

 # Replace single-arg create_coinbase calls ...
 # ... followed by ntime arg
 sed --in-place --regexp-extended 's/create_block\((.+), create_coinbase\(([^,]+)\), /create_block(\1, height=\2, ntime=/g' $( git grep -l 'create_block(' )
 # ... not followed by any other args
 sed --in-place --regexp-extended 's/create_block\((.+), create_coinbase\(([^,]+)\)\)/create_block(\1, height=\2)/g'        $( git grep -l 'create_block(' )

-END VERIFY SCRIPT-

test/functional/example_test.py

@@ -176,7 +176,7 @@ class ExampleTest(BitcoinTestFramework):
             # Use the blocktools functionality to manually build a block.
             # Calling the generate() rpc is easier, but this allows us to exactly
             # control the blocks and transactions.
-            block = create_block(self.tip, create_coinbase(height+1), self.block_time)
+            block = create_block(self.tip, height=height+1, ntime=self.block_time)
             block.solve()
             block_message = msg_block(block)
             # Send message is used to send a P2P message to the node over our P2PInterface