Need to use WebKeys.PAGE_TOP instead of duplicate constant LiferayConstants.LIFERAY_SHARED_PAGE_TOP

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: liferay-faces-2.1.0-ga1, liferay-faces-2.1.1-ga2, liferay-faces-3.0.0-legacy-ga1, liferay-faces-3.0.1-legacy-ga2, liferay-faces-3.0.0-ga1, liferay-faces-3.0.1-ga2, liferay-faces-3.1.0-ga1, liferay-faces-3.1.1-ga2
• Fix Version/s: liferay-faces-2.1.2-ga3, liferay-faces-3.0.2-legacy-ga3, liferay-faces-3.0.2-ga3, liferay-faces-3.1.2-ga3
• Component/s: Liferay Faces Bridge Impl / Demos / Tests
• Labels: None

The value of WebKeys.PAGE_TOP changed from Liferay 6.1.x to Liferay 6.2.x – plus there is no reason to maintain a separate constant in the bridge source code. The reason why this was done in the first place was because PortletFaces Bridge did not have any compile-time dependencies on the Liferay API like Liferay Faces Bridge does. Since the constant is only referenced in *LiferayImpl.java classes, it's OK to have a compile-time dependency.