fix 1900 failures of the following case issue:
`name[casing]: All names should start with an uppercase letter.`
Signed-off-by: Ryan Lerch <rlerch@redhat.com>
Otherwise we risk a conflict with other automatically allocated users,
right now it is:
fatal: [copr-keygen-dev.aws.fedoraproject.org]: FAILED! => {"changed": false, "msg": "useradd: UID 992 is not unique\n", "name": "copr-signer", "rc": 4}