Add mapping for ignore_errors to ignore_classes in SSC. (#225)

* Add mapping for ignore_errors to ignore_classes

* Correct logic for SSC remap

Author: TimPansino

newrelic/core/config.py

@@ -1008,6 +1008,12 @@ def apply_server_side_settings(server_side_config={}, settings=_settings):
         if value == 'apdex_f':
             agent_config['transaction_tracer.transaction_threshold'] = None
 
+    # If ignore_errors exists, and either ignore_classes is not set or it is empty
+    if "error_collector.ignore_errors" in agent_config and \
+        ("error_collector.ignore_classes" not in agent_config or not agent_config["error_collector.ignore_classes"]):
+        # Remap to newer config key
+        agent_config["error_collector.ignore_classes"] = agent_config.pop("error_collector.ignore_errors")
+
     # Overlay with agent server side configuration settings.
 
     for (name, value) in agent_config.items():