verdi quicksetup assumes presence of sudo

[ltalirz]

Reported by @yakutovicha on AiiDA lab (aiida v0.12.2)

Profile name [quicksetup]: test
Email Address (identifies your data when sharing): test@gmail.com
First Name: test
Last Name: test
Institution: test
Traceback (most recent call last):
  File "/usr/local/bin/verdi", line 11, in <module>
    sys.exit(run())
  File "/usr/local/lib/python2.7/dist-packages/aiida/cmdline/verdilib.py", line 1050, in run
    aiida.cmdline.verdilib.exec_from_cmdline(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/aiida/cmdline/verdilib.py", line 1035, in exec_from_cmdline
    CommandClass.run(*argv[command_position + 1:])
  File "/usr/local/lib/python2.7/dist-packages/aiida/cmdline/verdilib.py", line 622, in run
    quicksetup.invoke(ctx)
  File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python2.7/dist-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/click/decorators.py", line 27, in new_func
    return f(get_current_context().obj, args, *kwargs)
  File "/usr/local/lib/python2.7/dist-packages/aiida/cmdline/verdilib.py", line 655, in quicksetup
    success = postgres.determine_setup()
  File "/usr/local/lib/python2.7/dist-packages/aiida/control/postgres.py", line 113, in determine_setup
    non_interactive=bool(not self.interactive), **dbinfo):
  File "/usr/local/lib/python2.7/dist-packages/aiida/control/postgres.py", line 281, in _try_subcmd
    _pg_execute_sh(r'\q', **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/aiida/control/postgres.py", line 345, in _pg_execute_sh
    result = subprocess.check_output(sudo_su_psql, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/subprocess32.py", line 629, in check_output
    process = Popen(stdout=PIPE, popenargs, *kwargs)
  File "/usr/local/lib/python2.7/dist-packages/subprocess32.py", line 825, in _init_
    restore_signals, start_new_session)
  File "/usr/local/lib/python2.7/dist-packages/subprocess32.py", line 1574, in _execute_child
    raise child_exception_type(errno_num, err_msg)
OSError: [Errno 2] No such file or directory: 'sudo'

This seems to apply both in master:
https://github.com/aiidateam/aiida_core/blob/651a09a60be4dfe34ec97d6f45fbe6e377af2c86/aiida/control/postgres.py#L345

and in develop:
https://github.com/aiidateam/aiida_core/blob/9ec944564bc7e4c2af58b17f0711d1c25be8b4b6/aiida/control/postgres.py#L334

To Do:

• figure out whether one just needs to wrap it in try/except or whether there is a (failing) check on the presence of sudo before this
• fix bug in master and develop

[ltalirz]

duplicate of #1382

[ltalirz]

Closing this in favor of #1382 (no new information here)