[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/apps/mlb/src/main/java/org/onosproject/mlb/MastershipLoadBalancer.java b/apps/mlb/src/main/java/org/onosproject/mlb/MastershipLoadBalancer.java
index 3bd3cef..ca6cd59 100644
--- a/apps/mlb/src/main/java/org/onosproject/mlb/MastershipLoadBalancer.java
+++ b/apps/mlb/src/main/java/org/onosproject/mlb/MastershipLoadBalancer.java
@@ -16,13 +16,6 @@
 
 package org.onosproject.mlb;
 
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Modified;
-import org.apache.felix.scr.annotations.Property;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.onlab.util.Tools;
 import org.onosproject.cfg.ComponentConfigService;
 import org.onosproject.cluster.ClusterService;
@@ -34,10 +27,16 @@
 import org.onosproject.mastership.MastershipEvent;
 import org.onosproject.mastership.MastershipListener;
 import org.onosproject.mastership.MastershipService;
-import org.osgi.service.component.ComponentContext;
 import org.onosproject.net.region.RegionEvent;
 import org.onosproject.net.region.RegionListener;
 import org.onosproject.net.region.RegionService;
+import org.osgi.service.component.ComponentContext;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Modified;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 
 import java.util.Dictionary;
@@ -63,8 +62,8 @@
     private final Logger log = getLogger(getClass());
 
     private static final int DEFAULT_SCHEDULE_PERIOD = 30;
-    @Property(name = "schedulePeriod", intValue = DEFAULT_SCHEDULE_PERIOD,
-            label = "Period to schedule balancing the mastership to be shared as evenly as by all online instances.")
+    //@Property(name = "schedulePeriod", intValue = DEFAULT_SCHEDULE_PERIOD,
+    //        label = "Period to schedule balancing the mastership to be shared as evenly as by all online instances.")
     private int schedulePeriod = DEFAULT_SCHEDULE_PERIOD;
 
     private static final String REBALANCE_MASTERSHIP = "rebalance/mastership";
@@ -75,22 +74,22 @@
 
     private AtomicReference<Future> nextTask = new AtomicReference<>();
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected MastershipService mastershipService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected MastershipAdminService mastershipAdminService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected LeadershipService leadershipService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected RegionService regionService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ClusterService clusterService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ComponentConfigService cfgService;
 
     private InnerLeadershipListener leadershipListener = new InnerLeadershipListener();