[QC-1286] Move the Configuration to a separate file

Author: Barthelemy

README.md

@@ -116,6 +116,14 @@ For a general overview of our (O2) software, organization and processes, please
           * [QC Aggregators configuration](doc/Advanced.md#qc-aggregators-configuration)
           * [QC Post-processing configuration](doc/Advanced.md#qc-post-processing-configuration)
           * [External tasks configuration](doc/Advanced.md#external-tasks-configuration)
+  * [Configuration](doc/Configuration.md)
+      * [Global configuration structure](doc/Configuration.md#global-configuration-structure)
+      * [Common configuration](doc/Configuration.md#common-configuration)
+      * [QC Tasks configuration](doc/Configuration.md#qc-tasks-configuration)
+      * [QC Checks configuration](doc/Configuration.md#qc-checks-configuration)
+      * [QC Aggregators configuration](doc/Configuration.md#qc-aggregators-configuration)
+      * [QC Post-processing configuration](doc/Configuration.md#qc-post-processing-configuration)
+      * [External tasks configuration](doc/Configuration.md#external-tasks-configuration)
   * [Miscellaneous](doc/Advanced.md#miscellaneous)
       * [Data Sampling monitoring](doc/Advanced.md#data-sampling-monitoring)
       * [Monitoring metrics](doc/Advanced.md#monitoring-metrics)