fix: initialize admin fee

Author: AlbertoCentonze

contracts/main/CurveTricryptoOptimized.vy

@@ -278,6 +278,7 @@ def __init__(
         )
     )
 
+    self.admin_fee = 5 * 10**9 # 50%
     log Transfer(empty(address), self, 0)  # <------- Fire empty transfer from
     #                                       0x0 to self for indexers to catch.
 

tests/boa/unitary/pool/admin/test_admin_fee.py

@@ -44,10 +44,7 @@ def _generate_fee_activity(swap, coins, depositor, trader):
             swap.exchange(1, 0, max(amounts[1] // 1000, 10**14), 0)
 
 
-def test_admin_fee_default(swap, admin_fee_default, factory_admin):
-    with boa.env.prank(factory_admin):
-        swap.set_admin_fee(admin_fee_default)
-
+def test_admin_fee_default(swap, admin_fee_default):
     assert swap.admin_fee() == admin_fee_default