Package all widgets sources into sources.jar (#16805)
Package all widgets sources into sources.jar (#16805)

Change-Id: Ia1a3d8444d0b660a1f0141e872230758fbf5d95a

carrchang/vaadin,mittop/vaadin,bmitc/vaadin,bmitc/vaadin,mittop/vaadin,carrchang/vaadin,bmitc/vaadin,carrchang/vaadin,mittop/vaadin,mittop/vaadin,bmitc/vaadin,carrchang/vaadin