Ensure that current uses of BaseException are required

* In some cases, it appears that Exception should have been used instead
  as there's no need to catch sys.exit KeyboardInterrupt and similar.
* In a few cases, it appears that BaseException is used because
  a library we depend on calls sys.exit() contrary to good coding
  design.  Comment those so that we know that those have been audited
  and found to be correct and change to use (Exception, SystemExit)
  instead.

lib/ansible/modules/monitoring/zabbix/zabbix_maintenance.py

@@ -152,7 +152,8 @@ def create_maintenance(zbx, group_ids, host_ids, start_time, maintenance_type, p
                 }]
             }
         )
-    except BaseException as e:
+    # zabbix_api can call sys.exit() so we need to catch SystemExit here
+    except (Exception, SystemExit) as e:
         return 1, None, str(e)
     return 0, None, None
 
@@ -176,7 +177,8 @@ def update_maintenance(zbx, maintenance_id, group_ids, host_ids, start_time, mai
                 }]
             }
         )
-    except BaseException as e:
+    # zabbix_api can call sys.exit() so we need to catch SystemExit here
+    except (Exception, SystemExit) as e:
         return 1, None, str(e)
     return 0, None, None
 
@@ -193,7 +195,8 @@ def get_maintenance(zbx, name):
                 "selectHosts": "extend"
             }
         )
-    except BaseException as e:
+    # zabbix_api can call sys.exit() so we need to catch SystemExit here
+    except (Exception, SystemExit) as e:
         return 1, None, str(e)
 
     for maintenance in maintenances:
@@ -207,7 +210,8 @@ def get_maintenance(zbx, name):
 def delete_maintenance(zbx, maintenance_id):
     try:
         zbx.maintenance.delete([maintenance_id])
-    except BaseException as e:
+    # zabbix_api can call sys.exit() so we need to catch SystemExit here
+    except (Exception, SystemExit) as e:
         return 1, None, str(e)
     return 0, None, None
 
@@ -225,7 +229,8 @@ def get_group_ids(zbx, host_groups):
                     }
                 }
             )
-        except BaseException as e:
+        # zabbix_api can call sys.exit() so we need to catch SystemExit here
+        except (Exception, SystemExit) as e:
             return 1, None, str(e)
 
         if not result:
@@ -249,7 +254,8 @@ def get_host_ids(zbx, host_names):
                     }
                 }
             )
-        except BaseException as e:
+        # zabbix_api can call sys.exit() so we need to catch SystemExit here
+        except (Exception, SystemExit) as e:
             return 1, None, str(e)
 
         if not result:
@@ -308,7 +314,8 @@ def main():
         zbx = ZabbixAPI(server_url, timeout=timeout, user=http_login_user, passwd=http_login_password,
                         validate_certs=validate_certs)
         zbx.login(login_user, login_password)
-    except BaseException as e:
+    # zabbix_api can call sys.exit() so we need to catch SystemExit here
+    except (Exception, SystemExit) as e:
         module.fail_json(msg="Failed to connect to Zabbix server: %s" % e)
 
     changed = False