Fix compilation problem: add missing apache-lang dep for page-fragments

Conflicts:
	pom.xml
Fix of a4jButton, TestSkinChange and TestPushJms test cases

Fixed JQuery locator for a4jButton, changed test for skinChange and exluced TestPushJms because demo for this test is currently not working in Portlet environment.
Change import for FindBy in DynamicTabsPage back

After merge last changes from upstream get compilation error fixed few commits earlier. Since dependency is on SNAPSHOT, don't investigate too much and just fix compilation error