Update test code to avoid stripping quotes

Fixes 2.9.0-dev-241-gcdbffc6fc != .9.0-dev-241-gcdbffc6f failure

Change-Id: I70b193cc5a66b4510b3740c41470180234eadbea
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/extended/test_software_manager.robot b/redfish/extended/test_software_manager.robot
index 3ba78a5..49d4adf 100755
--- a/redfish/extended/test_software_manager.robot
+++ b/redfish/extended/test_software_manager.robot
@@ -275,7 +275,7 @@
     Open Connection And Log In
     ${cmd}=  Set Variable  grep ^VERSION_ID= /etc/os-release | cut -f 2 -d '='
     ${output}  ${stderr}  ${rc}=  BMC Execute Command  ${cmd}
-    Should Be Equal As Strings  ${version}  ${output[1:-1]}
+    Should Be Equal As Strings  ${version}  ${output}
 
 
 Check Activation Status