Fixing STP YANG model errors

Author: wajahatrazi

src/sonic-yang-mgmt/sonic_yang_ext.py

@@ -734,6 +734,10 @@ def _xlateContainer(self, model, yang, config, table):
                 # delete entry from copy of config
                 del configC[vKey]
 
+        if table == 'STP' and 'GLOBAL' in configC:
+            if 'GLOBAL' not in exceptionList:
+                exceptionList.append('GLOBAL')
+
         # All entries in copy of config must have been parsed.
         if len(configC):
             self.sysLog(msg="All Keys are not parsed in {}\n{}".format(table, \