SONAR-14647 added licence information

sonarqube/license.md

@@ -1 +1 @@
-View [license information](http://www.gnu.org/licenses/lgpl.txt) for the software contained in this image.
+SonarQube Community Edition is licensed under [GNU Lesser General Public License, Version 3.0](http://www.gnu.org/licenses/lgpl.txt). SonarQube Developer, Enterprise, and Data Center Editions are licensed under [SonarSource Terms and Conditions](https://www.sonarsource.com/docs/sonarsource_terms_and_conditions.pdf).