convert IndividuallyCappedCrowdsale to initializers

contracts/crowdsale/validation/IndividuallyCappedCrowdsale.sol

 pragma solidity ^0.4.24;
 
+import "../../Initializable.sol";
 import "../../math/SafeMath.sol";
 import "../Crowdsale.sol";
 import "../../access/roles/CapperRole.sol";
@@ -9,12 +10,16 @@ import "../../access/roles/CapperRole.sol";
  * @title IndividuallyCappedCrowdsale
  * @dev Crowdsale with per-beneficiary caps.
  */
-contract IndividuallyCappedCrowdsale is Crowdsale, CapperRole {
+contract IndividuallyCappedCrowdsale is Initializable, Crowdsale, CapperRole {
   using SafeMath for uint256;
 
   mapping(address => uint256) private _contributions;
   mapping(address => uint256) private _caps;
 
+  function initialize() public initializer {
+    CapperRole.initialize();
+  }
+
   /**
    * @dev Sets a specific beneficiary's maximum contribution.
    * @param beneficiary Address to be capped

contracts/mocks/IndividuallyCappedCrowdsaleImpl.sol

 pragma solidity ^0.4.24;
 
+import "../Initializable.sol";
 import "../token/ERC20/IERC20.sol";
 import "../crowdsale/validation/IndividuallyCappedCrowdsale.sol";
 import "./CapperRoleMock.sol";
 
 
 contract IndividuallyCappedCrowdsaleImpl
-  is IndividuallyCappedCrowdsale, CapperRoleMock {
+  is Initializable, Crowdsale, IndividuallyCappedCrowdsale, CapperRoleMock {
 
   constructor(
     uint256 rate,
@@ -16,5 +17,7 @@ contract IndividuallyCappedCrowdsaleImpl
     public
     Crowdsale(rate, wallet, token)
   {
+    Crowdsale.initialize(rate, wallet, token);
+    IndividuallyCappedCrowdsale.initialize();
   }
 }

test/crowdsale/IndividuallyCappedCrowdsale.test.js

@@ -9,7 +9,7 @@ require('chai')
   .should();
 
 const IndividuallyCappedCrowdsaleImpl = artifacts.require('IndividuallyCappedCrowdsaleImpl');
-const SimpleToken = artifacts.require('SimpleToken');
+const SimpleToken = artifacts.require('SimpleTokenMock');
 const { shouldBehaveLikePublicRole } = require('../access/roles/PublicRole.behavior');
 
 contract('IndividuallyCappedCrowdsale', function (