fix bug affecting user setup

[Batcastle]

No description provided.

[pep8speaks]

Hello @Batcastle! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file usr/share/system-installer/modules/master.py:

Line 203:80: E501 line too long (83 > 79 characters)
Line 206:80: E501 line too long (82 > 79 characters)
Line 217:80: E501 line too long (88 > 79 characters)
Line 221:80: E501 line too long (85 > 79 characters)
Line 330:80: E501 line too long (80 > 79 characters)
Line 333:80: E501 line too long (87 > 79 characters)
Line 339:80: E501 line too long (81 > 79 characters)
Line 360:80: E501 line too long (84 > 79 characters)
Line 404:80: E501 line too long (127 > 79 characters)
Line 405:80: E501 line too long (109 > 79 characters)
Line 422:80: E501 line too long (131 > 79 characters)
Line 423:80: E501 line too long (119 > 79 characters)