Moving file from redfish/session_service/test_sessions_management.robot to redfish/service_root/test_sessions_management.robot

Change-Id: I9cc504788bc52ead979cb4a500b492e58d07f0a8
Signed-off-by: Sushil Singh <susilsi7@in.ibm.com>
diff --git a/redfish/session_service/test_sessions_management.robot b/redfish/service_root/test_sessions_management.robot
similarity index 100%
rename from redfish/session_service/test_sessions_management.robot
rename to redfish/service_root/test_sessions_management.robot