[ITB-1790] Add copyright notice to all source code

Author: costas80

NOTICE.md

@@ -15,7 +15,7 @@ language governing permissions and limitations under the Licence.
 
 This product depends on software developed by third parties as listed in the following sections.
 
-## Licence overview
+## Third-party library licence overview
 
 | Licence type | Name | Dependency | Version | Link |
 | :----------- | :--- | :--------- | :------ | :--- |

etc/licence/third-party-licence-template.ftl

@@ -41,7 +41,7 @@ language governing permissions and limitations under the Licence.
 
 This product depends on software developed by third parties as listed in the following sections.
 
-## Licence overview
+## Third-party library licence overview
 
 | Licence type | Name | Dependency | Version | Link |
 | :----------- | :--- | :--------- | :------ | :--- |