Refactor obmc-phosphor-qemu

Renamed to obmc-phosphor-example-pydbus.
Prep for forthcoming sdbus example.
Added signal example.
diff --git a/conf/machine/include/sample.inc b/conf/machine/include/sample.inc
index 7db2883..3b67e8d 100644
--- a/conf/machine/include/sample.inc
+++ b/conf/machine/include/sample.inc
@@ -6,14 +6,14 @@
         "
 
 VIRTUAL-RUNTIME_obmc-phosphor-fan-ctl = " \
-       obmc-phosphor-qemu \
+       obmc-phosphor-example-pydbus \
        "
 VIRTUAL-RUNTIME_obmc-phosphor-sensor-ctl = " \
-       obmc-phosphor-qemu \
+       obmc-phosphor-example-pydbus \
        "
 VIRTUAL-RUNTIME_obmc-phosphor-chassis-ctl = " \
-       obmc-phosphor-qemu \
+       obmc-phosphor-example-pydbus \
        "
 VIRTUAL-RUNTIME_obmc-phosphor-flash-ctl = " \
-       obmc-phosphor-qemu \
+       obmc-phosphor-example-pydbus \
        "