Add helper funcs to add/remove attribute archiving

lib/archiver.py

+#! /usr/bin/env python3
+
+from .lofar2_config import configure_logging
+from tango import DeviceProxy
+
+
+def add_attribute_to_archiver(attribute: str, polling_period: float, event_period: float, archive_manager: str = 'archiving/hdbpp/confmanager01', archiver: str = 'archiving/hdbpp/eventsubscriber01'):
+    am = DeviceProxy(archive_manager)
+    am.write_attribute('SetAttributeName', attribute)
+    am.write_attribute('SetArchiver', archiver)
+    am.write_attribute('SetStrategy', 'ALWAYS')
+    am.write_attribute('SetPollingPeriod', int(polling_period))
+    am.write_attribute('SetPeriodEvent', int(event_period))
+    am.AttributeAdd()
+    am.AttributeStart(attribute)
+
+def remove_attribute_from_archiver(attribute: str, archive_manager: str = 'archiving/hdbpp/confmanager01'):
+    am = DeviceProxy(archive_manager)
+    am.AttributeStop(attribute)
+    am.AttributeRemove(attribute)