vagrant FEATURE release version of Ubuntu vagrant image

Contains Netopeer2GUI installed from packages - no source compilation
or running Angular server. libyang and libnetconf2 are installed from
binary packages, Netopeer2GUI backend and frontend are doployed as
Apache2 WSGI script. This is how it is supposed to be deployed in a
production way.
diff --git a/vagrant/Ubuntu-release/netopeer-config.ini b/vagrant/Ubuntu-release/netopeer-config.ini
new file mode 100644
index 0000000..c3ba0ae
--- /dev/null
+++ b/vagrant/Ubuntu-release/netopeer-config.ini
@@ -0,0 +1,2 @@
+[netopeer]
+usersdata_path=/var/www/html/ncgui/data