Fix cucumber: Scenario: Wallet imports pre_mine UTXO

[hansieodendaal]

Step panicked. Captured output: Transaction from WALLET_A to WALLET_B with amount 1000000 at fee 100 failed to be broadcasted
  Scenario: Wallet imports pre_mine UTXO
   ✔  Given I have a seed node NODE
   ✔  When I have 1 base nodes connected to all seed nodes
   ✔  When I have wallet WALLET_A connected to all seed nodes
   ✔  When I have wallet WALLET_B connected to all seed nodes
   ✔  When I have wallet WALLET_C connected to all seed nodes
   ✔  When I have mining node MINER connected to base node NODE and wallet WALLET_A
   ✔  When mining node MINER mines 5 blocks
   ✔  Then all nodes are at height 5
   ✔  Then I wait for wallet WALLET_A to have at least 10000000000 uT
   ✘  When I send 1000000 uT from wallet WALLET_A to wallet WALLET_B at fee 100