ipmi: Move ipmi sensor config recipe

The sensor config recipe is a native recipe.  Native recipes
do not build packages and therefore cannot be a packagegroup.

Do not inherit packagegroup and remove references to variables
without meaning in native context like PACKAGES.
Rename the recipe to reflect its status as a native recipe.
Move the recipe to the ipmi namespace since it isn't a packagegroup.
Fix up the associated bbappend in the OpenPower layer.

This eliminates a number of "manifest-foo:populate_sysroot not
found" build warnings.

Change-Id: Id56896efaa7e11a2427047d896ee36e69139de31
Tested: Built a witherspoon image
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-mrw-native.bb b/meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-mrw-native.bb
index 67c6996..9c846a5 100644
--- a/meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-mrw-native.bb
+++ b/meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-sensor-inventory-mrw-native.bb
@@ -10,7 +10,7 @@
 DEPENDS += " \
            mrw-native \
            mrw-perl-tools-native \
-           packagegroup-obmc-ipmi-sensors \
+           phosphor-ipmi-sensor-config-native \
            phosphor-ipmi-sensor-inventory-mrw-config-native \
            "