Unable to set global parameters in command line mode

[guoguojenna]

I enabled CI testing in my forked repository of configshell-fb to validate changes. The CI workflow:

1. Builds an RPM package from the latest source code
2. Uses the newly built configshell-fb RPM while keeping other dependencies from Fedora/centos stream repositories
3. Runs the test suite

Through this testing, I discovered an issue that where global parameters cannot be set in command line mode, though they work correctly in interactive mode. For example:

# targetcli /iscsi/ get global max_backup_files
max_backup_files=11 
# targetcli /iscsi/ set global max_backup_files=6
Parameter max_backup_files is now '6'.
# targetcli /iscsi/ get global max_backup_files
max_backup_files=11 
# targetcli /iscsi/ set global max_backup_files=10
Parameter max_backup_files is now '10'.
# targetcli /iscsi/ get global max_backup_files
max_backup_files=11 

https://artifacts.dev.testing-farm.io/72dcf404-3342-4bcb-9e5e-39e26e97ba9b/