Make installer install java silently
Make installer install java silently

Change-Id: Id12fda21f7988d18a5b8da11b169ceb7769891fb
Reviewed-on: http://gerrit.dmdirc.com/1782
Reviewed-by: Chris Smith <711c73f64afdce07b7e38039a96d2224209e9a6c@dmdirc.com>
Automatic-Compile: DMDirc Local Commits <fd7610eb81751244add0a62da2de7da51cfdce47@googlemail.com>

DMDirc/Installers,DMDirc/Installers,DMDirc/Installers,DMDirc/Installers