[apt] Move unattended-upgrades log collection

Having u-u logs collection inside the apt
plugin make more sense as it is using apt
functionnalities and python modules such as
apt, apt_inst, apt_pkg.

u-u is a mechanism to automatically install
security upgrades on Debian/Ubuntu. It is
enabled by default at installation.

Signed-off-by: Eric Desrochers <eric.desrochers@canonical.com>

sos/report/plugins/apt.py

@@ -20,7 +20,9 @@ class Apt(Plugin, DebianPlugin, UbuntuPlugin):
 
     def setup(self):
         self.add_copy_spec([
-            "/etc/apt", "/var/log/apt"
+            "/etc/apt", 
+            "/var/log/apt",
+            "/var/log/unattended-upgrades"
         ])
 
         self.add_forbidden_path("/etc/apt/auth.conf")

sos/report/plugins/logs.py

@@ -48,7 +48,6 @@ def setup(self):
             "/etc/rsyslog.d",
             "/var/log/boot.log",
             "/var/log/installer",
-            "/var/log/unattended-upgrades",
             "/var/log/messages*",
             "/var/log/secure*",
             "/var/log/udev",