Gracefully recover from Redis connection failures in Sidekiq initializer

Precompiling assets and other Rake tasks would fail if Redis were not available in certain cases.

• Closes gitlab-org/gitlab-ce#25143
• Closes omnibus-gitlab#1743 (closed)

Mentioned in issue #25143 (closed)

@stanhu Does this need a changelog entry?

@yorickpeterse Yes, added.

Added 1 commit:

• ddc85541 - Gracefully recover from Redis connection failures in Sidekiq initializer

Compare with previous version

Enabled an automatic merge when the build for ddc85541 succeeds

@stanhu The downtime task is failing but this seems to have been solved in master, could you rebase?

Added 128 commits:

• ddc85541...8146ad81 - 127 commits from branch master
• fe0de99c - Gracefully recover from Redis connection failures in Sidekiq initializer

Compare with previous version

Rebased!

Enabled an automatic merge when the build for fe0de99c succeeds

Mentioned in commit cf1a31a3

Status changed to merged

Mentioned in commit 01d77f62

Picked into 8-14-stable. Will go into 8.14.2.

Removed ~149423 label

mentioned in issue #25159 (closed)