pySim-shell_test/utils: treat cmd2 error "not a recognized command... as exception

When a pySim-shell command is not recognized, cmd2 prints "xyz is not a
recognized command, alias, or macro." This string is a normal print out
and not an exception, but during tests, it may point out a severe problem
and therefore it should be tread like an exception.

Related: OS#6367
Change-Id: I17be6af1547b31170622e17b9cfb9c492597670d

tests/pySim-shell_test/utils.py

@@ -285,7 +285,7 @@ class UnittestUtils(unittest.TestCase):
             raise RuntimeError("pySim-shell exits with error code %u" % py_sim_shell_rc)
 
         # Check log for exceptions
-        exception_regex_compiled = re.compile('.*EXCEPTION.*')
+        exception_regex_compiled = re.compile('.*EXCEPTION.*|.*is not a recognized command, alias, or macro.*')
         exceptions_strings = re.findall(exception_regex_compiled, logfile_content)
         if exceptions_strings != []:
             print("The following exceptions occurred:")