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-vty-reference.xml b/doc/manuals/osmogbproxy-vty-reference.xml
index ecf2268..5c2a16a 100644
--- a/doc/manuals/osmogbproxy-vty-reference.xml
+++ b/doc/manuals/osmogbproxy-vty-reference.xml
@@ -6,7 +6,7 @@
 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML 5.0//EN"
 "http://docbook.org/xml/5.0/dtd/docbook.dtd" [
 <!ENTITY chapter-vty      SYSTEM      "./common/chapters/vty.xml" >
-<!ENTITY sections-vty     SYSTEM      "generated/docbook_osmogbproxy-vty-reference.xml"  >
+<!ENTITY sections-vty     SYSTEM      "generated/docbook_vty.xml"  >
 ]>
 
 <book>