Hi @Vinod_Kumar2 ,
Welcome to SonarSource community! 
Maven projects cannot use sonar-project.properties. You need to define the properties directly in the pom.xml's <properties></properties> node like so, using the sonar.* pattern similar to the parameters in sonar-project.properties or apply them at the command line like system properties with -Dsonar.*:
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
<aggregate.report.dir>tests/target/site/jacoco-aggregate/jacoco.xml</aggregate.report.dir>
<sonar.exclusions>module1/**</sonar.exclusions>
</properties>