Some HCMI Samples are missing cancer type

[jjacobson95]

51 GDC/HCMI Samples are missing cancer type in the latest build.

I think this results from missing mappings in the hcmi_cancer_types.csv file.

Sample example with missing info:
HCM-BROD-0577-C15 / c9d4980c-ecb8-49c9-b82a-d83f83dc6ecb

[sgosline]

This should be updated to be 'Normal'.