Implement api tests for OCS v2

[haribhandari07]

Description

PR https://github.com/owncloud/twofactor_totp/pull/131 adds api tests for OCS api v1. This PR adds api test for ocs v2.

Related Issue

Fixed: https://github.com/owncloud/twofactor_totp/issues/132

How Has This Been Tested?

CI

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Database schema changes (next release will require increase of minor version instead of patch)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Technical debt
• [x] Tests only (no source changes)

[codecov[bot]]

Codecov Report

Merging #134 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #134   +/-   ##
=========================================
  Coverage     67.87%   67.87%           
  Complexity       67       67           
=========================================
  Files            14       14           
  Lines           277      277           
=========================================
  Hits            188      188           
  Misses           89       89

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