Update:
You can get the alarm default values using:
from com.inductiveautomation.ignition.common.alarming.config import CommonAlarmProperties, AlarmModeProperties
properties = {}
properties.update(dict((s.getName(), s.getDefaultValue()) for s in CommonAlarmProperties.values()))
properties.update(dict((s.getName(), s.getDefaultValue()) for s in AlarmModeProperties.values()))