Bug 578166 - Signing information apparent in the Plug-ins tab of the
About dialog

Introduce org.eclipse.equinox.internal.p2.ui.KeySigningInfoFactory to
provide the adapter for the AboutBundleData.ExtendedSigningInfo
interface.  The signature and key information is gathered from the
artifact metadata of the bundle pool repository of the installation.

Change-Id: I578b62cb0a20d4141d38c2b587e39ae8bc0dfd4d
Signed-off-by: Ed Merks <ed.merks@gmail.com>
Reviewed-on: https://git.eclipse.org/r/c/equinox/rt.equinox.p2/+/190744
9 files changed