download karaf 4.2.1 from maven central

Change-Id: Icb7e0400ee5b34ed4be33afdda5074a6f6ec1f6d
diff --git a/lib/deps.json b/lib/deps.json
index a305f74..6a54523 100644
--- a/lib/deps.json
+++ b/lib/deps.json
@@ -276,8 +276,7 @@
     "typesafe-config": "mvn:com.typesafe:config:1.3.2",
     "validation-api": "mvn:javax.validation:validation-api:1.1.0.Final",
     "checkstyle": "mvn:com.puppycrawl.tools:checkstyle:8.10",
-    "apache-karaf": "http://repo1.maven.org/maven2/org/onosproject/apache-karaf-offline/3.0.8/apache-karaf-offline-3.0.8.tar.gz",
-    "apache-karaf-patches": "http://repo1.maven.org/maven2/org/onosproject/onos-apache-karaf-patches/3.0.8/onos-apache-karaf-patches-3.0.8.tar.gz",
+    "apache-karaf": "http://repo1.maven.org/maven2/org/onosproject/apache-karaf-offline/4.2.1-base/apache-karaf-offline-4.2.1-base.tar.gz",
     "bndlib": "mvn:biz.aQute.bnd:biz.aQute.bndlib:jar:4.0.0",
     "bndexe": "mvn:biz.aQute.bnd:biz.aQute.bnd:4.0.0",
     "libthrift": "mvn:org.apache.thrift:libthrift:0.9.3",