Tool: Fix bug - Fix function naming issue in system info (#200)

**Description**
Fix function naming issue in system info.

**Major Revision**
- fix function naming issue in system info 
- save to json file
- add timeout for subprocess.run
- revise error handling to print exception message

tests/cli/test_sb.py

@@ -84,4 +84,4 @@ def test_sb_run_nonexist_host_file(self):
 
     def test_sb_node_info(self):
         """Test sb node info, should fail."""
-        self.cmd('sb node info', expect_failure=True)
+        self.cmd('sb node info', expect_failure=False)