SONAR-19850 Write BBT to validate change of main branch

build.gradle

@@ -218,7 +218,7 @@ subprojects {
         srcDirs = ['src/bbt/resources']
       }
       java {
-        srcDirs += ['src/bbt/java']
+        srcDirs = ['src/bbt/java']
       }
     }
   }