Use embeddable ocdav go micro service (#3397)

* allow proxy to route to micro service

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* use go micre ocdav service instead of reva frontend

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* add missing gateway default config

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* update reva branch for testing

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* add changelog

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* add missing comands

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* bump reva version

Signed-off-by: jkoberg <jkoberg@owncloud.com>

* tidy

Signed-off-by: jkoberg <jkoberg@owncloud.com>

* bump reva again

Signed-off-by: jkoberg <jkoberg@owncloud.com>

* a blind mans config change

Signed-off-by: jkoberg <jkoberg@owncloud.com>

* add ocdav to must start extensions

Signed-off-by: jkoberg <jkoberg@owncloud.com>

* fail when neither backend nor service is set

Signed-off-by: jkoberg <jkoberg@owncloud.com>

Co-authored-by: jkoberg <jkoberg@owncloud.com>

tests/parallelDeployAcceptance/drone/ocis/proxy.yaml

@@ -19,15 +19,17 @@ policies:
         endpoint: "/remote.php/?preview=1"
         backend: http://localhost:9115
       - endpoint: "/remote.php/"
-        backend: http://localhost:9140
+        service: "ocdav"
       - endpoint: "/dav/"
-        backend: http://localhost:9140
+        service: "ocdav"
       - endpoint: "/webdav/"
-        backend: http://localhost:9140
+        service: "ocdav"
       - endpoint: "/status.php"
-        backend: http://localhost:9140
+        service: "ocdav"
       - endpoint: "/index.php/"
-        backend: http://localhost:9140
+        service: "ocdav"
+      - endpoint: "/apps/"
+        service: "ocdav"
       - endpoint: "/index.php/login"
         backend: http://localhost:9100
       - endpoint: "/login"