SYSTEMCTL: Check if running before stopping

When uninstalling the RDC application - the user is greeted with an
annoying "Failed to stop rdc.service..." message if the RDC is not
running.
This change makes sure RDC is active before trying to stop it.

Change-Id: I6fa57bfd4b9c348514cd6c38e60ed3930d32b62c
Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>

src/DEBIAN_prerm.in

@@ -1,8 +1,8 @@
 #!/bin/bash
 
 stop_rdc() {
-    if [ -d /run/systemd/system ]; then
-        #stop RDC if running
+    #stop RDC service if systemd exists and service is running
+    if [ -d /run/systemd/system ] && $( systemctl is-active --quiet rdc ); then
         systemctl stop rdc
     fi
     return 0

src/RPM_postun.in

@@ -1,8 +1,8 @@
 #!/bin/bash
 
 stop_rdc() {
-    #stop RDC if running
-    if [ -d /run/systemd/system ]; then
+    #stop RDC service if systemd exists and service is running
+    if [ -d /run/systemd/system ] && $( systemctl is-active --quiet rdc ); then
         systemctl stop rdc
     fi
     return 0