Refactor obmc-phosphor-qemu

Renamed to obmc-phosphor-example-pydbus.
Prep for forthcoming sdbus example.
Added signal example.
diff --git a/common/recipes-phosphor/obmc-phosphor-example-pydbus/files/obmc-phosphor-example-pydbus.service b/common/recipes-phosphor/obmc-phosphor-example-pydbus/files/obmc-phosphor-example-pydbus.service
new file mode 100644
index 0000000..d39395f
--- /dev/null
+++ b/common/recipes-phosphor/obmc-phosphor-example-pydbus/files/obmc-phosphor-example-pydbus.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Phosphor OpenBMC QEMU application example
+
+[Service]
+ExecStart=/usr/sbin/obmc-phosphor-example-pydbus
+
+[Install]
+WantedBy=multi-user.target