Moved advanceBlock to time. (#1523)

* Added advanceBlock to time, moved tests around.

* Removed the standalone advanceBlock.

* Removed the 'id' field

* Fixed linter error.

* Removed the 'latest' test, since it only works if time hasn't been fast-forwarded.

* Removed .only directive.

test/examples/SampleCrowdsale.test.js

@@ -1,5 +1,4 @@
 const { ether } = require('../helpers/ether');
-const { advanceBlock } = require('../helpers/advanceToBlock');
 const shouldFail = require('../helpers/shouldFail');
 const time = require('../helpers/time');
 const { balanceDifference } = require('../helpers/balanceDifference');
@@ -20,7 +19,7 @@ contract('SampleCrowdsale', function ([_, deployer, owner, wallet, investor]) {
 
   before(async function () {
     // Advance to the next block to correctly read time in the solidity "now" function interpreted by ganache
-    await advanceBlock();
+    await time.advanceBlock();
   });
 
   beforeEach(async function () {