pkg-list: Changed some ubiquity package names

Some ubiquity package names was changed in le5 repo
some names have now the sufix '-light' to specify these
packages to the le5 light distribution

pkg-list/le5/light/install.list

 le-light-desktop
 le-plymouth-theme
 le-plymouth-theme-text
-ubiquity-frontend-gtk-le
+ubiquity-frontend-gtk-le-light
 ubiquity-le
 ubiquity-le-artwork
-ubiquity-slideshow-le
+ubiquity-slideshow-le-light
 le-proinfodata-installer
 openjdk-7-jre
 openjdk-7-jre-headless

pkg-list/le5/light/install.list-remove

-casper
 ubiquity-le
-ubiquity-frontend-gtk-le
-ubiquity-slideshow-le
+ubiquity-frontend-gtk-le-light
+ubiquity-slideshow-le-light
 ubiquity-le-artwork