[BUG] gs_quant python entity Country not working

[LeoWu64]

Describe the bug
country entity only work with lower-case non-space country name

To Reproduce

from gs_quant.entities.entity import Country, Subdivision
from gs_quant.markets.securities import Asset, AssetIdentifier


for cty in ['taiwan', 'Taiwan', 'china', 'united states', 'United Kingdom']:
    print( cty, ': ', Country.get(cty, Country.Identifier.NAME) )

Expected behavior
all countries should be found

Screenshots

Systems setup:

• OS: Windows 10
• Python version
• GS-Quant version 1.0.3

Additional context
Add any other context about the problem here.

[jtranquilli]

I would like to be assigned to this issue

[jtranquilli]

I'll be submitting a pull request that solves this issue in a minute.
The 'Country' class, found in in 'entity.py', inherits its 'get' method from the 'Entity' class.
I was able to solve this issue with seemingly no averse effects by adding in
'id_value = id_value.lower()'
on line 114 of 'entity.py', thereby converting all potentially malicious inputs to be lowercase, as the functionalities of the Country class expect them to be.