csv-ami-2glm converter doesn't handle phases and repeat IDs correctly

[aivanova5]

Problem description

The AMI converter seems to not have the right flexibility when adding multi phase loads. The input is hard coded and should be automated based on the parent of the load.

In addition, given than AMI structure ID's refer to transformers, the converter adds duplicate loads on the high side and low side of the transformer. It needs to find the low voltage side and only add the load there.