Contract fixes (#195)

* Revoke owner of CapManager implementation

* Revoke owner of Market Wrapper implementations

Author: naddison36

src/contracts/CapManager.sol

@@ -31,6 +31,8 @@ contract CapManager is Initializable, OwnableOperable {
 
     constructor(address _arm) {
         arm = _arm;
+
+        _setOwner(address(0)); // Revoke owner for implementation contract at deployment
     }
 
     function initialize(address _operator) external initializer {

src/contracts/markets/Abstract4626MarketWrapper.sol

@@ -43,6 +43,8 @@ contract Abstract4626MarketWrapper is Initializable, Ownable {
         market = _market;
 
         asset = IERC4626(_market).asset();
+
+        _setOwner(address(0)); // Revoke owner for implementation contract at deployment
     }
 
     /// @notice Initialize the proxy contract with the Harvester address.