Move the restart systemdunit function to network manager

Change-Id: I647741fc3976ca82c39998a518b1de7be5365e80
Signed-off-by: Ratan Gupta <ratagupt@linux.vnet.ibm.com>
diff --git a/ethernet_interface.cpp b/ethernet_interface.cpp
index 893cd4c..f2ad372 100644
--- a/ethernet_interface.cpp
+++ b/ethernet_interface.cpp
@@ -463,7 +463,7 @@
     writeConfigurationFile();
     // timesynchd reads the NTP server configuration from the
     // network file.
-    restartSystemdUnit(networkdService);
+    manager.restartSystemdUnit(networkdService);
     return ntpServers;
 }
 // Need to merge the below function with the code which writes the
@@ -701,7 +701,7 @@
     // ip for the changed mac address.
     if (dHCPEnabled())
     {
-        restartSystemdUnit(networkdService);
+        manager.restartSystemdUnit(networkdService);
     }
     return mac;
 }