✨ "same as" relationship support

[bunop]

Description

• model same as relationship into database and views
• submit data to BioSamples with the same as relationship

Related Issue

closes #70

Motivation and Context

This PR support the same as relationship between an InjectTool record and an already Submitted BioSamples ID (not submitted by InjectTool)

How Has This Been Tested?

This was tested with UnitTest and by submitting data to BioSamples test servers

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change which improve code itself)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[bunop]

validation/tests/test_helpers.py::SubmissionTestCase::test_animal test fails with
['Warning: Fail to retrieve record SAMEA4450079 from BioSamples as required in the relationship for Record ANIMAL:::ID:::132713']. Why? mock up this

[coveralls]

Coverage increased (+0.001%) to 97.926% when pulling c47bee2 on issue-70 into 659f48c on devel.