Align Eclipse compiler settings with core Gerrit's
Align Eclipse compiler settings with core Gerrit's

Having the same compiler settings as core Gerrit means that when
the project is opened in its standalone Eclipse project, the same
warnings appear as when opened within the Gerrit tree (i.e. as a
bundled plugin).

Change-Id: I72ee1b550db591655370952a1465ad1fdf4acb9b

GerritCodeReview/plugins_importer,GerritCodeReview/plugins_importer,GerritCodeReview/plugins_importer,GerritCodeReview/plugins_importer