Merge branch 'fix-missing-import' into 'master'

Fix missing import

See merge request core/python!8

bin/showgroup.py

 #!/usr/bin/env python3
 
+import sys
+import argparse
 import lib_path
 import lib
-import argparse
 import tabulate
 import dphysldap
 

lib/isg/dphysldap.py

 #!/usr/bin/env python3
 
+import ssl
 import lib_path
 import lib
 import ldap3
-import ssl
 
 SERVERS = ['phd-aa1.ethz.ch', 'phd-aa2.ethz.ch', 'phd-aa3.ethz.ch']
 BASE = 'dc=phys,dc=ethz,dc=ch'