Merge "Create Distribution Version chapter of developer guide" into stable/boron

diff --cc docs/developer-guide/index.rst
index 80dfd26f7619ad73febae54fc97dfee9bd56e276,cc09d71c89e389af73b1a4ffdbf21a459e56716f..c2795ebed3f2848c33bfa32906fc101a567f7b72
--- 1/docs/developer-guide/index.rst
--- 2/docs/developer-guide/index.rst
+++ b/docs/developer-guide/index.rst
@@@ -23,9 -23,8 +23,10 @@@ Project-specific Developer Guide
     cardinal_-opendaylight-monitoring-as-a-service
     controller
     didm-developer-guide
+    distribution-version
     dlux
 +   fabric-as-a-service
 +   infrautils-developer-guide
     iotdm-developer-guide
     l2switch-developer-guide
     lacp-developer-guide