phosphor-objmgr: recipe cleanups

Big cleanups to the phosphor-mapper/phosphor-objmgr recipe.

  - Remove all "mapper-config-native" constructs as the underlying
    repository has no such support.

  - Remove all mapper-related bbclasses as they are no longer relevant.

  - Remove environment support in service file as the mapper executable
    no longer supports any arguments.

  - Greatly simplify the 'libmapper' packaging to avoid stray python
    in the recipe.

  - Update all recipes to use `DEPENDS += "libmapper"` where appropriate
    for clarity if they use libmapper.

  - Rename the recipe from phosphor-mapper to phosphor-objmgr to match
    the repository name, which allows simpler devtool invocations.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5a64e2feddd1a7919813e007411f9c28b6c9a330
diff --git a/meta-phosphor/recipes-phosphor/chassis/obmc-op-control-power_git.bb b/meta-phosphor/recipes-phosphor/chassis/obmc-op-control-power_git.bb
index 4d8fb37..1a65a11 100644
--- a/meta-phosphor/recipes-phosphor/chassis/obmc-op-control-power_git.bb
+++ b/meta-phosphor/recipes-phosphor/chassis/obmc-op-control-power_git.bb
@@ -7,7 +7,7 @@
 inherit obmc-phosphor-dbus-service
 inherit pkgconfig
 
-DEPENDS += "phosphor-mapper systemd"
+DEPENDS += "libmapper systemd"
 
 SKELETON_DIR = "op-pwrctl"