Description of problem:
cupsd.conf LogLevel ignored when logging through journald

Version-Release number of selected component (if applicable):
28

How reproducible:
Every time

Steps to Reproduce:
1. DEFAULT CASE (state after initial installation)
cupsd.conf:
LogLevel warn

cups-files.conf:
AccessLog syslog
ErrorLog syslog
PageLog syslog

2. CASE 2
Change cupsd.conf:
LogLevel none

Same cups-files.conf as case 1

3. CASE 3
Change cupsd.conf:
LogLevel warn

Change cups-files.conf:
AccessLog /var/log/cups/access_Log
ErrorLog /var/log/cups/error_log
PageLog /var/log/cups/page_log

4. CASE 4
Change cupsd.conf:
LogLevel debug

cups-files.conf - same as case 3

Actual results:
CASE 1: all debug messages written to journald
CASE 2: all debug messages written to journald
CASE 3: normal messages written to /var/log/cups/...
CASE 4: all debug message written to /var/log/cups/...

Expected results:
CASE 1: journald should get the same messages as filed in case 3
CASE 2: no cups printing message logged to journald
CASE 3: behaves as expected
CASE 4: behaves as expected

Additional info:
When printing single page using journald logging, CUPS generates literally thousands of debug messages in the journal, regardless of LogLevel. 

"systemd-journald[2622]: Suppressed 3748 messages from cups.service" says it all really.

Isn't anything tested anymore? This is basic functionality.