"lgx" and "lg" should only return 2-fields

[mmaiers-nmdp]

 >>> ard.redux_gl('DRB1*14:06:01', "lgx")
'DRB1*14:06:01'

>>> ard.redux_gl('DRB1*14:05:01', "lgx")
'DRB1*14:05'

14:06:01 returns 3-field because this allele is not in a G group
14:05:01 is so it returns 2-field

14:06:01 should return 2-field for "lgx" and "lg"

[pbashyal-nmdp]

Initial investigation
In both cases, they reach the following line in redux function:

py-ard/pyard/pyard.py

Line 409 in ecff778

elif ars_type == "lgx" and allele in self._lgx:

'DRB1*14:05:01' is found in self._lgx and it's lgx variant is returned return self.lgx[allele]
while
'DRB1*14:06:01' is not found in self._lgx and just returns return allele

Next Step
'DRB1*14:06:01' needs to be populated in self._lgx

[amadboul-nmdp]

This is a good first issue to address :)