Mute Direct modification of compileSourceRoots warning

Change-Id: Ia692b8828d259c96d6d771075a03ff37b2225c67
diff --git a/pom.xml b/pom.xml
index 8f120a3..18f73e2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,6 +47,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <force.fast>false</force.fast>
+        <maven.project.sourceRoots.warningsDisabled>true</maven.project.sourceRoots.warningsDisabled>
     </properties>
 
     <distributionManagement>