Update trisquel-release-upgrader to compile on latest

helpers/DATA/ubuntu-release-upgrader/DistUpgrade.cfg

@@ -37,7 +37,7 @@ EnableApport=yes
 #SlideshowUrl=http://people.canonical.com/~mvo/ubiquity-slideshow-upgrade/slides/
 
 [KernelRemoval]
-Version=4.4.0
+Version=4.15.0
 BaseNames=linux-image,linux-headers,linux-image-debug,linux-backport-modules,
   linux-header-lbm,linux-signed-image,linux-tools,linux-cloud-tools,
   linux-image-extra
@@ -48,22 +48,22 @@ Types=386,ec2,generic,generic-lpae,lowlatency,powerpc-e500mc,powerpc-smp,
 [trisquel]
 KeyDependencies=trisquel-desktop-common-data, unity-greeter, lightdm
 # those pkgs will be marked remove right after the distUpgrade in the cache
-PostUpgradeRemove=casper, xscreensaver, gnome-cups-manager, powermanagement-interface, deskbar-applet, nautilus-cd-burner, compiz-core, gdm, gnome-ppp, gwibber, remmina-common, resolvconf
-ForcedObsoletes=desktop-effects, cups-pdf, policykit-gnome, gnome-mount, notification-daemon, trisquel-session, libcogl15, libcogl-pango15, gnome-app-install, resolvconf
+PostUpgradeRemove=casper, xscreensaver,  powermanagement-interface, compiz-core, gdm, gnome-ppp, remmina-common, resolvconf
+ForcedObsoletes= cups-pdf, notification-daemon, libcogl15, resolvconf
 
 [trisquel-mini]
 KeyDependencies=trisquel-mini-data unity-greeter
 #Remove previous gnome component from ltrisquel to avoid pulling gnome depends on upgrade (LP: #945215)
 PostUpgradeRemove=casper, gnome-bluetooth, gnome-power-manager, resolvconf
-ForcedObsoletes=desktop-effects, cups-pdf, policykit-gnome, gnome-mount, notification-daemon, trisquel-session, libcogl15, libcogl-pango15, gnome-app-install, resolvconf
+ForcedObsoletes= cups-pdf, notification-daemon, libcogl15, resolvconf
 
 [Files]
 BackupExt=distUpgrade
 LogDir=/var/log/dist-upgrade/
 
 [Sources]
-From=flidas
-To=etiona
+From=etiona
+To=nabia
 ValidOrigin=Trisquel
 ValidMirrors = mirrors.cfg
 Components=main