Clean up code organizing tests structure

packages/mindplot/test/playground/BalancedTestSuite.js

@@ -17,7 +17,7 @@
  */
 const TestSuite = require('./TestSuite').default;
 
-const Mindplot = require('../../../lib/mindplot');
+const Mindplot = require('../../lib/mindplot');
 const mindplot = Mindplot();
 
 const BalancedTestSuite = new Class({

packages/mindplot/test/playground/FreeTestSuite.js

@@ -16,7 +16,7 @@
  *   limitations under the License.
  */
 const TestSuite = require('./TestSuite').default;
-const Mindplot = require('../../../lib/mindplot');
+const Mindplot = require('../../lib/mindplot');
 const mindplot = Mindplot();
 
 const FreeTestSuite = new Class({

packages/mindplot/test/playground/SymmetricTestSuite.js

@@ -16,7 +16,7 @@
  *   limitations under the License.
  */
 const TestSuite = require('./TestSuite').default;
-const Mindplot = require('../../../lib/mindplot');
+const Mindplot = require('../../lib/mindplot');
 const mindplot = Mindplot();
 
 const SymmetricTestSuite = new Class({

packages/mindplot/test/playground/TestSuite.js

@@ -15,7 +15,7 @@
  *   See the License for the specific language governing permissions and
  *   limitations under the License.
  */
-const Mindplot = require('../../../lib/mindplot');
+const Mindplot = require('../../lib/mindplot');
 const mindplot = Mindplot();
 
 const TestSuite = new Class({

packages/mindplot/test/playground/context-loader.js

@@ -1,10 +1,7 @@
-const Mindplot = require('../../lib/mindplot');
-global.mindplot = Mindplot();
-
-const TestSuite = require('./lib/TestSuite').default;
-const BalancedTestSuite = require('./lib/BalancedTestSuite').default;
-const SymmetricTestSuite = require('./lib/SymmetricTestSuite').default;
-const FreeTestSuite = require('./lib/FreeTestSuite').default;
+const TestSuite = require('./TestSuite').default;
+const BalancedTestSuite = require('./BalancedTestSuite').default;
+const SymmetricTestSuite = require('./SymmetricTestSuite').default;
+const FreeTestSuite = require('./FreeTestSuite').default;
 
 window.addEventListener('DOMContentLoaded', function () {
     var basicTest = new TestSuite();