Networking: Setup translation for RST

Setup configuration for translation of RST. There are already
translators working on it, so let's give them uptodate strings.

Remove DocBook networking-guide.pot and create an empty file for RST.
Our proposal bot will propose updated content.

Change-Id: I10cefe311b2dd08866ab887b3962b459395e4636

.tx/config

@@ -58,9 +58,9 @@ source_lang = en
 type = PO
 
 [openstack-manuals-i18n.networking-guide]
-file_filter = doc/networking-guide/locale/<lang>.po
+file_filter = doc/networking-guide/source/locale/<lang>/LC_MESSAGES/user-guides.po
 minimum_perc = 75
-source_file = doc/networking-guide/locale/networking-guide.pot
+source_file = doc/networking-guide/source/locale/networking-guide.pot
 source_lang = en
 type = PO
 

doc-tools-check-languages.conf

@@ -26,5 +26,5 @@ DOC_DIR="doc/"
 declare -A SPECIAL_BOOKS
 SPECIAL_BOOKS=(
     ["user-guides"]="RST"
-    ["networking-guide"]="skip"
+    ["networking-guide"]="RST"
 )