Enable sonar-coveralls for pr from fork repos (#3293)

.github/workflows/sonar-coveralls.yml

 # This workflow will build a Java project with Maven
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
 
-name: Sonar-Coveralls(Ignore this on folk Repos)
+name: Sonar-Coveralls
 
 on:
   push:
@@ -22,6 +22,7 @@ on:
 
 env:
   MAVEN_OPTS: -Dhttp.keepAlive=false -Dmaven.wagon.http.pool=false -Dmaven.wagon.http.retryHandler.class=standard -Dmaven.wagon.http.retryHandler.count=3
+  PR_NUMBER: ${{ github.event.number }}
 
 jobs:
   ubuntu: