make dnf timeout configurable

module_build_service/config.py

@@ -661,7 +661,12 @@ class Config(object):
             "desc": "The minrate configuration on a DNF repo. This configuration will cause DNF to "
                     "timeout loading a repo if the download speed is below minrate for the "
                     "duration of the timeout."
-        }
+        },
+        "dnf_timeout": {
+            "type": int,
+            "default": 30,
+            "desc": "The timeout configuration for dnf operations, in seconds."
+        },
     }
 
     def __init__(self, conf_section_obj):

module_build_service/scheduler/default_modules.py

@@ -366,6 +366,7 @@ def _get_rpms_in_external_repo(repo_url, arches, cache_dir_name):
     dnf_conf.cachedir = cache_location
     # Don't skip repos that can't be synchronized
     dnf_conf.skip_if_unavailable = False
+    dnf_conf.timeout = conf.dnf_timeout
     # Get rid of everything to be sure it's a blank slate. This doesn't delete the cached repo data.
     base.reset(repos=True, goal=True, sack=True)