Merge pull request #154 from owncloud/release/0.2.1

Prepare v0.2.1

changelog/0.2.1_2020-04-28/reva-ocis-logger.md

@@ -0,0 +1,5 @@
+Enhancement: Use a configured logger on reva runtime
+
+For consistency reasons we need a configured logger that is inline with an ocis logger, so the log cascade can be easily parsed by a human.
+
+https://github.com/owncloud/ocis-reva/pull/153