Node: fix SONiC detection, and bug fix (#919)

The newer SONiC versions have a different string to match to extract
the version. Add that. Plus, fix a bug in extracting the version
during device init.

Signed-off-by: Dinesh Dutt <[email protected]>

Author: ddutt

suzieq/config/textfsm_templates/sonic_showsys.tfsm

@@ -9,6 +9,7 @@ Start
   ^${bootupTimestamp}.*$$
   ^\s*Architecture:\s+${architecture}\s*$$
   ^SONiC Software Version\s*:\s*${version}\s*$$
+  ^Software\s+Version\s*:\s*${version}.*$$
   ^Product: Enterprise SONiC Distribution by\s*${vendor}\s*$$
   ^HwSKU\s*:\s+${model}\s*$$
   ^Serial Number: ${serialNumber}

suzieq/poller/worker/nodes/node.py

@@ -2093,7 +2093,7 @@ async def _parse_init_dev_data_devtype(self, output, cb_token) -> None:
         if (len(output) > 1) and (output[1]["status"] == 0):
             self.hostname = output[1]["data"].strip()
         if (len(output) > 2) and (output[2]["status"] == 0):
-            self._extract_nos_version(output[1]["data"])
+            self._extract_nos_version(output[2]["data"])
 
     def _extract_nos_version(self, data: str) -> None:
         match = re.search(r'Version:\s+SONiC-OS-([^-]+)', data)