AMI tag info dict retrieval fix for python 3 (ATR-21096)
In python 3 the format of the output of the AMIGetAMITagInfo command in pyAMI changed, compared to python 2.
In the python 3 version, the result vector has an additional dictionary inserted (details are in ATLASAMI-217).
However, this difference is only when using access-mode 'dom_object'. In access mode 'dict_object' the returned result is consistent between python 2 and python 3 and what is expected.
This solves ATR-21096.
cc @jeodier