LPS-44135 Move language property from SO-portlet to announcements portlet

announcements
LPS-44135 Move language property from SO-portlet to private messaging portlet
LPS-44135 Move language property from SO-portlet to contacts portlet
LPS-44135 Move language property from SO-portlet to microblogs portlet
LPS-44135 Move language property from SO-portlet to task portlet
LPS-44135 Delete duplicated lang keys
LPS-44135 Run ant build-lang in each portlet
LPS-44135 SF