Revert "Remove eu-central-1 again."
Revert "Remove eu-central-1 again."

This reverts commit a02de7103119151e118f4c067904a99242dd3411.

hitmaker/graylog2-images,ojengwa/graylog2-images,danucalovj/graylog2-images,timstott/graylog2-images,sekka1/graylog2-images,kolomiichenko/graylog2-images,danucalovj/graylog2-images,Graylog2/graylog2-images,modulexcite/graylog2-images,timstott/graylog2-images,Graylog2/graylog2-images,sekka1/graylog2-images,modulexcite/graylog2-images,ojengwa/graylog2-images,kolomiichenko/graylog2-images,hitmaker/graylog2-images