In cat.snapshots, repository is required

Closes elastic#17216

In cat.snapshots, repository is required

Closes elastic#17216

Add missing index name to indexing slow log

This was lost in a previous refactoring moving away from AbstractIndexShardComponent
which automatically adds the hostname and the shard ID to the logger prefix. This commit
brings back this property.

Relates to elastic#17025
Backport of elastic#17026

release [1.7.5]

Tribe node: pass path.conf to inner tribe clients

If we don't do this, and some path.conf is set when starting the tribe node, that path.conf will be ignored and the inner tribe clients will try to read elsewhere, where they most likely don't have permissions to read from.

Closes elastic#16253
Closes elastic#16258

docs: Updated examples and added note about the fact that the `/` for…

… date rounding in date math index names should be url encoded as `%2F`

Merge pull request elastic#15475 from s1monw/beef_up_translog_tests

Beef up TranslogTests with concurrent fatal exceptions test

Merge pull request elastic#15304 from cjohansen/patch-1

Fix typo

release [1.7.4]

Updated plugin docs for 2.1.0