Changed uses of "Execute Command On OS" to "OS Execute Command"

- In utils_os.robot

Change-Id: I412c04df0f96e5f0faee01d5e320210c8ec7fdb2
Signed-off-by: Joy Onyerikwu <onyekachukwu.joy.onyerikwu@ibm.com>
1 file changed