update testnet config to set first block to 2,473,585

indexer/includes/config.php

@@ -42,7 +42,7 @@
 // Testnet config
 if(NETWORK=='testnet'){
     // First block with BTNS transaction (none yet, so just picking block)
-    define("FIRST_BLOCK",2466000);
+    define("FIRST_BLOCK",2473585);
 
     // BTNS Address 
     define('BURN_ADDRESS', "mvCounterpartyXXXXXXXXXXXXXXW24Hef");