over prescriptive password rule

**Describe the bug**
S3 requires a password to be set. The document says: `Should not be kept 'admin'`. There is a rule that prohibits using `admin`. If a user wants to use `admin` as the password they should be able to.

**To Reproduce**
Steps to reproduce the behavior:
1. When prompted to provide an s3 password, type `admin`
2. See error
3.
**Expected behavior**
`admin` should be accepted as the password

No file, test, or entry point is named. Start by locating the S3 password validation and its related test, then reproduce the prompt with `admin`; done means that value is accepted while the documented password behavior remains consistent.

Written by the indexing model from the issue text.