Package diag-domain-controller: Information

- NMU: added 'exit_status = true' for new version of executor

- added the is_nslcd_service_disabled test (thx Sergey Savelev)
- added the is_nscd_service_disabled test (thx Sergey Savelev)
- added the is_list_trusts_validated test (thx Sergey Savelev)
- added the is_dns_lookup_realm_disabled test (thx Sergey Savelev)

- fix: the fixed the is_sections_with_domain_name_in_krb5_empty test (thx Sergey Savelev)
- fix: fixed the does_sysvol_contain_necessary_files test (thx Sergey Savelev)
- For a test to verify that the [realms] and [domain_realm] sections
  from krb5.conf are empty, the corresponding section has been added
  to the .diag file (thx Sergey Savelev)
- Added check that [realms] and [domain_realm] sections are not empty (thx Sergey Savelev)
- The logic of the function for checking the caching of Kerberos
  tickets has been changed (thx Sergey Savelev)
- The function for checking the entry "nameserver 127.0.0.1" in
  the configuration file resolv.conf has been updated (thx Sergey Savelev)
- The logic of tests based on timedatectl has become simpler (thx Sergey Savelev)
- Changed the function to check if the samba service is running (thx Sergey Savelev)
- Added side function to check if service is active (thx Sergey Savelev)
- Fixed output of errors related to samba-tool (thx Sergey Savelev)
- To check the location of the folder with the domain name in sysvol
  in the file .diag has added a corresponding section (thx Sergey Savelev)
- Added a test to check for non-empty "Policies" and "scripts"
  folders in sysvol/<domain_name> (thx Sergey Savelev)
- The function for checking the domain name match from smb.conf
  and krb5.conf uses functions to get domain names from these files (thx Sergey Savelev)
- The function to check for the required domain name in resolv.conf
  uses the function to get the domain name from krb5.conf and the
  list of domain names from resolv.conf (thx Sergey Savelev)
- In the hostname validation test, a function is called to get the
  domain name from smb.conf (thx Sergey Savelev)
- Variables containing the domain name from different configuration
  files are rendered as separate functions (thx Sergey Savelev)
- Add port listening test to .diag (thx Sergey Savelev)
- Added a test to verify that certain ports are being listened to
  by the necessary services (thx Sergey Savelev)
- The function to verify that the "samba" package is installed
  in the system is simplified, a side function is used to check the
  installed packages (thx Sergey Savelev)
- Added a side function to check that packages are installed in
  the system (thx Sergey Savelev)