[Rails5] '-1' is not a valid data_store

Note: add rails5 to a branch name to trigger rails5 specific CI jobs.

https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/72478329

Failures:

  1) Ci::BuildTraceChunk#data when data_store is others 
     Failure/Error: build_trace_chunk.send(:write_attribute, :data_store, -1)

     ArgumentError:
       '-1' is not a valid data_store
     # ./spec/models/ci/build_trace_chunk_spec.rb:60:in `block (4 levels) in <top (required)>'
     # ./spec/spec_helper.rb:167:in `block (2 levels) in <top (required)>'