[BUG] WIMS responds with an error if len(quser) < 4

[qcoumes]

Describe the bug
The username generated for WIMS (quser) currently uses the <first letter of the first name><last name> format, which can produce a quser with less than 4 characters if the last name is short. This results in WIMS responding with:

• login name must not be <quser> (illegal, or wrong length)

Expected behavior
This problem can be solved by appending a 0-padded 1 at the end of the quser so that it reaches 4 characters. For instance ab -> ab01.