pyphosphor: split into subpackages

Add namespace packages for packages that install python modules
into the obmc site-packages namespace.

Split the modules in the dbuslib and utils dirs into a dbus and
utils package.

This enables more granular dependency expression in other
recipes.

Change-Id: I6fd8abc1a56584f25b300260370c8ed2ed9e03ec
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-phosphor/rest-dbus/rest-dbus.bb b/common/recipes-phosphor/rest-dbus/rest-dbus.bb
index ee1b80d..8cc8428 100644
--- a/common/recipes-phosphor/rest-dbus/rest-dbus.bb
+++ b/common/recipes-phosphor/rest-dbus/rest-dbus.bb
@@ -13,7 +13,7 @@
         python-json \
         python-dbus \
         python-xml \
-        pyphosphor \
+        pyphosphor-dbus \
         "
 
 SYSTEMD_SERVICE_${PN} += "rest-dbus.service rest-dbus.socket"