Don't constantly re-init the MainServlet
Revert "Revert "LPS-45018 As a developer I'd like to be able to register PortletDataHandler impls from OSGi""

This reverts commit e1f5404898b0adcfe967389c414190a7665d0902.
Revert "Revert "LPS-45033 As a developer I'd like to be able to register StagedModelDataHandler impls from OSGi""

This reverts commit c1a16901e34d048faf182e502a320061f47a7315.
Revert "Revert "LPS-45033 My eclipse doesn't seem to give these warnings""

This reverts commit 9998e2e025a0c911c816d4b0badaa45daba05224.