Make first login into OSIDB fault-tolerant

On a user's first login we trigger a signal that creates a new Profile
object which will link the kerberos login to Bugzilla and JIRA
usernames, however this can fail for a number of reasons (expired token,
service unavailable, network failure, etc.) and thus we should take care
to handle such exceptions and simply let the user login without linking
said credentials.

In the future we should try to sync at other points in time if possible.

osidb/signals.py

@@ -1,3 +1,4 @@
+import logging
 import os
 
 from bugzilla import Bugzilla
@@ -8,37 +9,53 @@
 
 from osidb.models import Profile
 
+logger = logging.getLogger(__name__)
+
 
 def get_bz_user_id(email: str) -> str:
     api_key = os.getenv("BZIMPORT_BZ_API_KEY")
     bz_url = os.getenv("BZIMPORT_BZ_URL", "https://bugzilla.redhat.com")
-    bz_api = Bugzilla(
-        bz_url,
-        api_key=api_key,
-        force_rest=True,
-    )
-    users = bz_api.searchusers([email])
-    if users:
-        return users[0].name
-    return ""
+    try:
+        bz_api = Bugzilla(
+            bz_url,
+            api_key=api_key,
+            force_rest=True,
+        )
+        users = bz_api.searchusers([email])
+    except Exception:
+        logger.error(
+            f"Failed to fetch Bugzilla username for {email}, is the Bugzilla token valid?"
+        )
+        return ""
+    else:
+        if users:
+            return users[0].name
+        return ""
 
 
 def get_jira_user_id(email: str) -> str:
     auth_token = os.getenv("JIRA_AUTH_TOKEN")
     jira_url = os.getenv("JIRA_URL", "https://issues.redhat.com")
-    jira_api = JIRA(
-        {
-            "server": jira_url,
-            # avoid auto-updating the lib
-            "check_update": False,
-        },
-        token_auth=auth_token,
-        get_server_info=False,
-    )
-    users = jira_api.search_users([email])
-    if users:
-        return users[0].name
-    return ""
+    try:
+        jira_api = JIRA(
+            {
+                "server": jira_url,
+                # avoid auto-updating the lib
+                "check_update": False,
+            },
+            token_auth=auth_token,
+            get_server_info=False,
+        )
+        users = jira_api.search_users([email])
+    except Exception:
+        logger.error(
+            f"Failed to fetch JIRA username for {email}, is the JIRA token valid?"
+        )
+        return ""
+    else:
+        if users:
+            return users[0].name
+        return ""
 
 
 @receiver(post_save, sender=User)