Modifies sonar properties

Signed-off-by: Martin Melik Merkumians <melik-merkumians@acin.tuwien.ac.at>

sonar-project.properties

@@ -2,4 +2,5 @@ sonar.projectKey=OpENer
 sonar.organization=eipstackgroup
 sonar.cfamily.build-wrapper-output=bw-output
 sonar.host.url=https://sonarcloud.io
+sonar.coverage.exclusions=**/tests/**,=**/tests/**/*,**/tests/*,**/src/ports/**/sample_application/*