add-gcs

[lruizcalico]

Description of your changes

1. refactor hound_snp to add gcs functionalities
2. change outdated BatchNormalization
3. add .upper() to ref snp check

Issue ticket number and link

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation add / update

(If applicable) How has this been tested?

tested locally with local files and also gcs files
tested on google composer

[davek44]

In my snpclust pull request, I changed the name of 'calculate_sad' to 'score_snps'. I also added a new "-c" option that specifies SNP clustering behavior. We'll want access to that for the cloud pipeline.