callback fixes and get rid of resolver interface

Signed-off-by: VoR0220 <catalanor0220@gmail.com>

lib/modules/ens/contracts/ResolverInterface.sol

@@ -1,10 +0,0 @@
-pragma solidity ^0.4.18;
-
-contract ResolverInterface {
-    function PublicResolver(address ensAddr) public;
-    function setAddr(bytes32 node, address addr) public;
-    function setHash(bytes32 node, bytes32 hash) public;
-    function addr(bytes32 node) public view returns (address);
-    function hash(bytes32 node) public view returns (bytes32);
-    function supportsInterface(bytes4 interfaceID) public pure returns (bool);
-}

lib/modules/ens/embarkjs.js

@@ -214,8 +214,8 @@ __embarkENS.lookup = function (address, cb) {
     return resolverContract.methods.name(node).call();
   }).then((name) => {
     if (name === "" || name === undefined) {
-      cb(new Error("Name not found"), null);      
+      return cb(new Error("Name not found"));      
     }
-    cb(null, name);
-  }).catch(err => cb(err));
+    return cb(null, name);
+  }).catch(cb);
 };

lib/modules/ens/index.js

@@ -20,7 +20,7 @@ class ENS {
           address: contract.deployedAddress
         };
         self.addSetProvider(config);
-        return cb();
+        cb();
       });
     });
   }