Add poetry, Fix debug and Fix clone version

[helllllllder]

What

• Use Poetry instead of Pipenv 🥳
• Update travis, docker files, makefile and README to use Poetry
• Rename the clone task from debug_parse_text to clone_version
• Use bulk_create instead of loops when possible at clone_version task
• Update RepositoryVersionLanguage to have repository_version and language as unique_together.
• Add RepositoryVersionLanguage query on RepositoryAuthorizationInfoViewSet

Why

• Be free of pipenv
• Solve a bug that appears when creating new versions, it was possible to create duplicates of a RepositoryVersionLanguage with the same repository_version and language.
• Solve the debug endpoint, as it wasn't working with repository_version_language. Because of this, the debug functionality wasn't working properly. It was using only the default version of the repository, instead of using the repository_version_language that was passed in the request

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[coveralls]

Pull Request Test Coverage Report for Build 4447

• 1 of 5 (20.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 79.621%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
bothub/common/tasks.py	0	4	0.0%

Totals
Change from base Build 4421:	0.02%
Covered Lines:	4157
Relevant Lines:	5221

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💛 - Coveralls