Exclude external js libs from sonar

Exclude external js libraries from sonar code coverage scan.

Change-Id: I9d2e255a3314d4a9d218cdbe8af8210dd47cbf81
Issue-ID: CCSDK-1561
Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
diff --git a/pom.xml b/pom.xml
index 73a4168..a3fc796 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,6 +20,7 @@
     
     <properties>
         <enforcer.skip>true</enforcer.skip>
+        <sonar.exclusions>**/external/**</sonar.exclusions>
     </properties>
 
     <modules>