dash: Fix initialiseWallet

Only the upgradetohd command sets the hdseed
upgradetohd can only run once the chain is synced

Basicswap stores the hash of the root_key in it's db to check for the expected seed.
Prefer not to store the real key.

setup.py

@@ -40,6 +40,7 @@ setuptools.setup(
         "requests",
         "pycryptodome",
         "PySocks",
+        "mnemonic",
     ],
     entry_points={
         "console_scripts": [