fix: additional python paths in containers

[kelly-sovacool]

Changes

• create_circExplorer_merged_found_counts_table - set container
• create_hq_bams - base container needs to be updated with pythonpath
  • upgrade base container to v7: upgrade base ubuntu container to v7 Dockers#35

Issues

• resolves python path issue in create_circExplorer_merged_found_counts_table #124
• depends on set $PYTHONPATH in base container Dockers#33

PR Checklist

(Strikethrough any points that are not applicable.)

• This comment contains a description of changes with justifications, with any relevant issues linked.
• [ ] Update docs if there are any API changes.
• Update CHANGELOG.md with a short description of any user-facing changes and reference the PR number. Guidelines: https://keepachangelog.com/en/1.1.0/

[kelly-sovacool]

test in progress here: /data/CCBR/projects/techDev/charlie_test_iss-124