Fill out expected liquidv1 chain size

Currently it is 1.1 GB according to my local machine.

Overshooting by 3x to account for growth.

src/chainparams.cpp

@@ -689,6 +689,9 @@ public:
         fMineBlocksOnDemand = false;
         m_fallback_fee_enabled = false; // TODO Will this break stuff?
 
+        m_assumed_blockchain_size = 3;
+        m_assumed_chain_state_size = 1;
+
         bech32_hrp = "ex"; // ex(plicit)
         blech32_hrp = "lq"; // l(i)q(uid)
         parent_bech32_hrp = "bc";