minimum allele count for beacon init

[teemukataja]

Description

Add option --min_allele_count to beacon_init tool to be able to ignore rare alleles.

Examples

• Default: minimum allele count by default is 1, all variants will be loaded into the database
• --min_allele_count 20 only variants that have an allele count of at least 20 will be loaded into the database

Type of change

• New feature (non-breaking change which adds functionality)

Changes Made

• New feature to db_load.py
• Updated docs
• Updates unit tests
• Bumped feature number

Testing

• Unit Tests
• Manual QA

Mentions

Requested by THL Biobank.

[blankdots]

approved, not mandatory to fix but some comments:
1.7.2 - > 1.7.3 minor version update as it is not that radical change
I would match the same number of parameters in load_datafile to keep it consistent and avoid similar issues