Description of problem:
Create a rhel-edge-container image with bp that a user is added, then install rhel for edge. Can use that user to login system. Then make an upgrade bp, add additional RPMs, but do not define any user, create an upgrade image. 
Upgrade rhel for edge, after upgrade, cannot login with that user.


Version-Release number of selected component (if applicable):
RHEL 8.4

How reproducible:
Everytime

Steps to Reproduce:
1. Create blueprint like this, define a user named admin.
name = "container"
description = "A base rhel-edge container image"
version = "0.0.1"
modules = []
groups = []

[[packages]]
name = "python36"
version = "*"

[customizations]
[customizations.kernel]
name = "kernel-rt"
append = ""

[[customizations.user]]
name = "admin"
description = "Administrator account"
password = "$6$GRmb7S0p8vsYmXzH$o0E020S.9JQGaHkszoog4ha4AQVs3sk8q0DvLjSMxoxHBKnB2FBXGQ/OkwZQfW/76ktHd0NX5nls2LPxPuUdl."
key = "ssh-rsa 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 ostree-image-test"
home = "/home/admin/"
groups = ["wheel"]

2. Use this blueprint to build image, "composer-cli compose start-ostree container rhel-edge-container --ref rhel/8/x86_64/edge", after build finished, download image and run container, container serves ostree image content at http://192.168.100.1/repo/.


3. Create a Kickstart file, includes the ostree url http://192.168.100.1/repo/.

4. Use kickstart file to install RHEL for Edge, after installation, I can login as user admin.

5. Create a blueprint for upgrade like this, additional pkg added, but no user defined.
name = "upgrade-container"
description = "An upgrade rhel-edge container image"
version = "0.0.2"
modules = []
groups = []

[[packages]]
name = "python36"
version = "*"

[[packages]]
name = "expect"
version = "*"

[customizations]
[customizations.kernel]
name = "kernel-rt"
append = ""

6. Use this blueprint to build a rhel-edge-container image, "composer-cli compose start-ostree upgrade-container rhel-edge-container --url http://192.168.100.1/repo/ --ref rhel/8/x86_64/edge", after build finished, download image and run container.

7. Upgrade rhel for edge image, upgrade finished successfully. After reboot, I cannot login with user admin, error message is 'Login incorrect.'

vm login: admin
Password: 
Login incorrect



Actual results:
Cannot login as user admin after upgrade


Expected results:
Can login as user admin after upgrade


Additional info: