Wrong assertNotNull ALLOWABLE_ACTIONS on created folder entry without includeAllowableActions

You did a create folder within CMISTestFixture.getTestCaseFolder
without includeAllowableActions param.
SPEC says:
3212 • Boolean includeAllowableActions: If TRUE, then the Repository MUST return the
available actions for each object in the result set. Defaults to FALSE.
3213

then store it to the "entry" field at:
CMISTestFixture.createTree(Entry, Entry, int, int, String, String) line: 103
CMISTestFixture.createTestTree(String, int, int, String, String) line: 94
AccessControlListTest.testManageAccessControlList() line: 131

then use it at:
ManageAccessControlListVisitor.visit(EntryTree) line: 68
EntryTree.walkEntry(EntryTree, EntryTree$TreeVisitor) line: 126
EntryTree.walkTree(EntryTree$TreeVisitor) line: 118
AccessControlListTest.testManageAccessControlList() line: 132

// Check whether apply ACL is an allowable action
CMISAllowableActions objectAllowableActions = childObject.getExtension(CMISConstants.ALLOWABLE_ACTIONS);
Assert.assertNotNull(objectAllowableActions); // <=== here is should be null