Merge branch 'release/1.1.5' into develop
[TASK] Solr Cookbook

* Enhances documentation

Change-Id: I348e79dc54b4dbe7b9b7c9eb2493427b16af1420
Resolves: #8334
[TASK] Raises versionnumber
[TASK] Generates ChangeLog
Merge branch 'release/1.2.0'