[ONOS-5724],[ONOS-5725],[ONOS-5736] onos buck plugin modifications for support of private package property.

Change-Id: Ic3a2f13c14816e803debc208826445ef27b49a4f
diff --git a/tools/build/buck-plugin/src/main/java/org/onosproject/onosjar/OnosJarStepFactory.java b/tools/build/buck-plugin/src/main/java/org/onosproject/onosjar/OnosJarStepFactory.java
index ae2853b..fff225e3 100644
--- a/tools/build/buck-plugin/src/main/java/org/onosproject/onosjar/OnosJarStepFactory.java
+++ b/tools/build/buck-plugin/src/main/java/org/onosproject/onosjar/OnosJarStepFactory.java
@@ -57,6 +57,7 @@
     private final String bundleLicense;
     private final String bundleDescription;
     private final String importPackages;
+    private final String privatePackages;
     private final String exportPackages;
     private final String includeResources;
     private final String dynamicimportPackages;
@@ -77,10 +78,12 @@
                               Optional<String> importPackages,
                               Optional<String> exportPackages,
                               Optional<String> includeResources,
-                              Optional<String> dynamicimportPackages) {
+                              Optional<String> dynamicimportPackages,
+                              Optional<String> privatePackages) {
         super(javacOptions, amender);
         this.bundleDescription = processParameter(bundleDescription);
         this.importPackages = processParameter(importPackages);
+        this.privatePackages = processParameter(privatePackages);
         this.exportPackages = processParameter(exportPackages);
         this.includeResources = processParameter(includeResources);
         this.dynamicimportPackages = processParameter(dynamicimportPackages);
@@ -194,7 +197,8 @@
                 includeResources, // include resources
                 webContext, // web context
                 dynamicimportPackages, // dynamic import packages
-                bundleDescription  // bundle description
+                bundleDescription,  // bundle description
+                privatePackages // private packages
         );
         steps.add(osgiStep);