CLI: Fix sort(lambda) under Python 3

[joshmoore]

Discovered while testing for https://forum.image.sc/t/omero-cli-exit-status/44110

Without this PR:

(z) /opt/omero-py $omero errors
Traceback (most recent call last):
  File "/usr/local/anaconda3/envs/z/bin/omero", line 33, in <module>
    sys.exit(load_entry_point('omero-py', 'console_scripts', 'omero')())
  File "/opt/omero-py/target/omero/main.py", line 125, in main
    rv = omero.cli.argv()
  File "/opt/omero-py/target/omero/cli.py", line 1784, in argv
    cli.invoke(args[1:])
  File "/opt/omero-py/target/omero/cli.py", line 1222, in invoke
    stop = self.onecmd(line, previous_args)
  File "/opt/omero-py/target/omero/cli.py", line 1299, in onecmd
    self.execute(line, previous_args)
  File "/opt/omero-py/target/omero/cli.py", line 1381, in execute
    args.func(args)
  File "/opt/omero-py/target/omero/plugins/basics.py", line 296, in __call__
    combined.sort(lambda a, b: cmp(a[1].rcode, b[1].rcode))
TypeError: sort() takes no positional arguments

With this PR:

(z) /opt/omero-py $omero errors
   52	       hql	 BAD_QUERY	'Bad query: %s'
   52	    search	 BAD_QUERY	'Bad query: %s'
   53	       hql	 NOT_ADMIN	'SecurityViolation: Current user is not an admin an...'
   53	    search	 NOT_ADMIN	'SecurityViolation: Current user is not an admin an...'
   67	       hql	  NO_QUIET	'Can't ask for query with --quiet option'
   67	    search	  NO_QUIET	'Can't ask for query with --quiet option'
  123	     admin	NOT_WINDOWS	'Not Windows'
  200	     admin	     SETUP	'Error during service user set up:  (%s) %s'
  201	     admin	   RUNNING	'%s is already running. Use stop first'
  202	     admin	NO_SERVICE	'%s service deleted.'
  300	     admin	BAD_CONFIG	'Bad configuration: No IceGrid.Node.Data property'
  400	     admin	WIN_CONFIG	'%s is not in this directory. Abortin...'
  666	     admin	  NO_WIN32	'Could not import win32service and/or win32evtlogut...'

[imagesc-bot]

This pull request has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/omero-cli-exit-status/44110/2

[manics]

Is it worth adding a basic test to check it runs?

[joshmoore]

Green. Propose for patch release.

[sbesson]

👍 for releasing immediately