Swapped system contract to core.vaulta

Author: aaroncox

configs/.env.vaulta

@@ -12,7 +12,7 @@ PUBLIC_SYSTEM_TOKEN_LOCKED_SUPPLY="eosio,eosio.null"
 PUBLIC_LEGACY_TOKEN_CONTRACT="eosio.token"
 PUBLIC_LEGACY_TOKEN_SYMBOL="4,EOS"
 PUBLIC_LEGACY_TOKEN_EXCHANGERATE="1.0000 EOS"
-PUBLIC_SYSTEM_CONTRACT="eosio"
+PUBLIC_SYSTEM_CONTRACT="core.vaulta"
 PUBLIC_SYSTEM_TOKEN_LOGO_LIGHT=https://assets.wharfkit.com/chain/vaulta.png
 PUBLIC_SYSTEM_TOKEN_LOGO_DARK=https://assets.wharfkit.com/chain/vaulta.png
 PUBLIC_LEGACY_TOKEN_LOGO_LIGHT=https://assets.wharfkit.com/chain/eos.png