Move service files into repo and clean up OVERLAYS

Upstream request is to have service files in repo now.
Also limit scope of OVERLAYS flag to allow exports to
still work.

Change-Id: I61c8621a648556d277d4faf3dfe38a61343053ce
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/service_files/xyz.openbmc_project.EntityManager.service b/service_files/xyz.openbmc_project.EntityManager.service
new file mode 100644
index 0000000..aca242a
--- /dev/null
+++ b/service_files/xyz.openbmc_project.EntityManager.service
@@ -0,0 +1,15 @@
+[Unit]
+Description=Entity Manager
+Wants=mapper-wait@-xyz-openbmc_project-FruDevice.service
+After=mapper-wait@-xyz-openbmc_project-FruDevice.service
+ConditionFileNotEmpty={bindir}/entity-manager
+
+[Service]
+ExecStartPre=/bin/mkdir -p /var/configuration
+ExecStartPre=/bin/mkdir -p /tmp/overlays
+ExecStart=/usr/sbin/entity-manager
+Restart=always
+Type=simple
+
+[Install]
+WantedBy=basic.target