o.c.security: Add DummyLoginModule (any password except for user "fail")

Use w/ 'Basic' product to offer convenient starting point.
o.c.security.ui: Show credentials in security info view
Merge remote-tracking branch 'origin/master' into 4.0.x
o.c.startup: Application no longer closes Display

It's usually closed by the RCP framework. Additional close used to be
required for Mac OS X, but causes crash on Eclipse 4.4(.2).