ubuntu upgrade re-enabled openliberty@defaultServer

[srl295]

Describe the bug

Upgaded from 21.0.0.1-1ubuntu1 to 21.0.0.5-1ubuntu1. and openliberty@defaultServer was unexpectedly re-enabled.

# apt-get upgrade
…
The following packages will be upgraded:
  openliberty
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/171 MB of archives.
After this operation, 11.1 MB of additional disk space will be used.
Do you want to continue? [Y/n]
(Reading database ... 311867 files and directories currently installed.)
Preparing to unpack .../openliberty_21.0.0.5-1ubuntu1_all.deb ...
Unpacking openliberty (21.0.0.5-1ubuntu1) over (21.0.0.1-1ubuntu1) ...
Removing leftover license and run directories
Reloading systemctl services after uninstall of openliberty
Setting up openliberty (21.0.0.5-1ubuntu1) ...
Adding group - openliberty
Adding user - openliberty
Setting up the systemd openliberty service
Created symlink /etc/systemd/system/multi-user.target.wants/openliberty@defaultServer.service → /lib/systemd/system/openliberty@.service.
Creating the license directory
Creating server,log and run directory
Setting up defaultServer for user
Setting permissions to files/folders
Processing triggers for systemd (237-3ubuntu10.47) ...
Processing triggers for ureadahead (0.100.0-21) ...
root@st:/var/log/openliberty/cldr# service open
open-iscsi                 open-vm-tools              openliberty                openliberty@cldr           openliberty@defaultServer
root@st:/var/log/openliberty/cldr# service open^C
root@st:/var/log/openliberty/cldr# systemctl status openliberty@defaultServer.service
● openliberty@defaultServer.service - Open Liberty server
   Loaded: loaded (/lib/systemd/system/openliberty@.service; indirect; vendor preset: enabled)
   Active: inactive (dead)

May 26 18:46:54 st.unicode.org systemd[1]: Starting Open Liberty server...
May 26 18:46:55 st.unicode.org openliberty[1468]: Starting server defaultServer.
May 26 18:47:02 st.unicode.org openliberty[1468]: Server defaultServer started with process ID 1643.
May 26 18:47:02 st.unicode.org systemd[1]: Started Open Liberty server.
May 26 19:14:08 st.unicode.org systemd[1]: Stopping Open Liberty server...
May 26 19:14:08 st.unicode.org openliberty[11822]: Stopping server defaultServer.
May 26 19:14:10 st.unicode.org openliberty[11822]: Server defaultServer stopped.
May 26 19:14:10 st.unicode.org systemd[1]: Stopped Open Liberty server.
root@st:/var/log/openliberty/cldr# systemctl disable openliberty@defaultServer.service
Removed /etc/systemd/system/multi-user.target.wants/openliberty@defaultServer.service.
root@st:/var/log/openliberty/cldr# systemctl disable openliberty@defaultServer.service

Steps to Reproduce

• install openliberty@21.0.0.5-1ubuntu1
• disable the openliberty@defaultServer service, because we have our own named cldr (which automatically gets the label openliberty@cldr.service)
• upgrade openliberty

Expected behavior

• expected openliberty@defaultServer to remain disabled, but instead it was re-enabled (and was serving pages instead of our production server)

Diagnostic information:

• OpenLiberty Version: 21.0.0.1-1ubuntu1 to 21.0.0.5-1ubuntu1
• Ubuntu 18.04.5 LTS amd64

Additional context