packagegroup-core-console: remove

This provides one package group, packagegroup-core-apps-console, which
is usually brought in by adding "apps-console-core" to IMAGE_FEATURES.
Aside from the naming inconsistencies, this is a group of mostly
unrelated packages, none of which are actually "apps". Handling each
one:

* dbus: should mostly be brought in by package runtime dependencies
* avahi-daemon: if you are using packagegroup-base (as all images that
  inherit from core-image do) this is brought in by having "zeroconf" in
  DISTRO_FEATURES.
* portmap: not very useful by itself; should be brought in by selecting
  NFS server/client through other means.
* psplash (or whatever SPLASH is set to): this has been changed to be
  an explicit item "splash" in IMAGE_FEATURES. Since this is a fairly
  fundamental feature, a piece of code has been added to automatically
  handle this for images still using apps-console-core (and show a
  warning).

(From OE-Core rev: 592d6e602466628d10704835a7b07d3d713f58e1)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image.bbclass

@@ -39,6 +39,10 @@ def normal_groups(d):
     features = set(oe.data.typed_value('IMAGE_FEATURES', d))
     return features.difference(extras)
 
+# Define some very basic feature package groups
+SPLASH ?= "psplash"
+PACKAGE_GROUP_splash = "${SPLASH}"
+
 # Wildcards specifying complementary packages to install for every package that has been explicitly
 # installed into the rootfs
 def complementary_globs(featurevar, d):