Decrease database instance collection interval (#17676)

* Decrease database instance collection interval

* fix tests

Author: jmeunier28

mysql/datadog_checks/mysql/config.py

@@ -89,7 +89,7 @@ def __init__(self, instance):
         }
         self.log_unobfuscated_queries = is_affirmative(instance.get('log_unobfuscated_queries', False))
         self.log_unobfuscated_plans = is_affirmative(instance.get('log_unobfuscated_plans', False))
-        self.database_instance_collection_interval = instance.get('database_instance_collection_interval', 1800)
+        self.database_instance_collection_interval = instance.get('database_instance_collection_interval', 300)
         self.configuration_checks()
 
     def _build_tags(self, custom_tags):

mysql/tests/test_mysql.py

@@ -737,7 +737,7 @@ def test_database_instance_metadata(aggregator, dd_run_check, instance_complex,
     assert event['dbms'] == "mysql"
     assert event['tags'].sort() == tags.METRIC_TAGS.sort()
     assert event['integration_version'] == __version__
-    assert event['collection_interval'] == 1800
+    assert event['collection_interval'] == 300
     assert event['metadata'] == {
         'dbm': dbm_enabled,
         'connection_host': instance_complex['host'],