Release/v0.18.0

[lrschaef]

Reason for this PR

• Sprint increment

Changes in this PR

Admission Service

• Adapted Admission service to Operation 1.1 API
  • Removed POST endpoint for signed_proposal
  • Removed POST endpoint for signed_transaction

    Authentication Service

  • Removed lecturer and student from seeding

    Certificate Service

• No changes

  Configuration Service

• No changes

  Course Service

• No changes

  Examreg Service

• No changes

  Group Service

• No changes

  Matriculation Service

• Adapted Matriculation service to Operation 1.1 API
  • Removed POST endpoint for signed_proposal
  • Removed POST endpoint for signed_transaction

    Operation Service

• Adapted Operation Service to implement Operations 1.1 API
  • Added POST endpoint for unsigned_proposal_approve

    Report Service

  • Added endpoint for fetching a pdf with the certificate of enrollment
  • Fixed endpoint name to conform to the API definition

    User Service

• Fixed bug that lead to timeout when filtering for empty usernames

This release of version v0.18.0 consists of the following individual versions for each Service.	Service	version
Admission	v0.17.1
Authentication	v0.18.0
Certificate	v0.16.2
Configuration	v0.15.1
Course	v0.16.1
Examreg	v0.16.2
Group	v0.16.2
Matriculation	v0.17.1
Operation	v0.17.1
Report	v0.17.2
User	v0.17.1