Remove the dependency on python-systemd

Vagrantfile

@@ -35,7 +35,6 @@ $script = <<SCRIPT
         redhat-rpm-config \
         rpm-build \
         swig \
-        systemd-devel \
         https://kojipkgs.fedoraproject.org//packages/libmodulemd/1.1.3/1.fc27/x86_64/libmodulemd-1.1.3-1.fc27.x86_64.rpm
     cd /opt/module_build_service
     python setup.py develop

conf/config.py

@@ -62,8 +62,8 @@ class BaseConfiguration(object):
         # 'modularity-wg',
     ])
 
-    # Available backends are: console, file, journal.
-    LOG_BACKEND = 'journal'
+    # Available backends are: console and file
+    LOG_BACKEND = 'console'
 
     # Path to log file when LOG_BACKEND is set to "file".
     LOG_FILE = 'module_build_service.log'

module_build_service/logger.py

@@ -163,7 +163,7 @@ def str_to_log_level(level):
 
 
 def supported_log_backends():
-    return ("console", "journal", "file")
+    return ("console", "file")
 
 
 def init_logging(conf):
@@ -176,16 +176,6 @@ def init_logging(conf):
         logging.basicConfig(level=conf.log_level, format=log_format)
         log = logging.getLogger()
         log.setLevel(conf.log_level)
-    elif log_backend == "journal":
-        logging.basicConfig(level=conf.log_level, format=log_format)
-        try:
-            from systemd import journal
-        except Exception:
-            raise ValueError("systemd.journal module is not installed")
-
-        log = logging.getLogger()
-        log.propagate = False
-        log.addHandler(journal.JournalHandler())
     else:
         logging.basicConfig(filename=conf.log_file, level=conf.log_level,
                             format=log_format)