Further clean-up in osmo-sgsn -> osmo-gbproxy migration

* fix manuals builds, including vty reference generation
* fix vty tests
* remove manuals from osmo-sgsn
* update .gitreview
* update osmoappdesc.py

Related: OS#4992
Change-Id: I80439ab0d21a3fb33f38da42acbfe3fbb0941b91
diff --git a/doc/manuals/osmogbproxy-usermanual.adoc b/doc/manuals/osmogbproxy-usermanual.adoc
index d19bdd4..f4da954 100644
--- a/doc/manuals/osmogbproxy-usermanual.adoc
+++ b/doc/manuals/osmogbproxy-usermanual.adoc
@@ -25,7 +25,7 @@
 
 include::./common/chapters/control_if.adoc[]
 
-//include::{srcdir}/chapters/counters.adoc[]
+include::{srcdir}/chapters/counters_generated.adoc[]
 
 include::./common/chapters/port_numbers.adoc[]