Fixing OF flow and group provider run-time dependency.

Change-Id: I25fa3c72ab01500c39fc90198abc4c383a9512a2
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
index 7bf5878..bbf1436 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
@@ -53,6 +53,7 @@
 import org.onosproject.openflow.controller.OpenFlowSwitchListener;
 import org.onosproject.openflow.controller.RoleState;
 import org.onosproject.openflow.controller.ThirdPartyMessage;
+import org.onosproject.provider.of.flow.util.FlowEntryBuilder;
 import org.osgi.service.component.ComponentContext;
 import org.projectfloodlight.openflow.protocol.OFBadRequestCode;
 import org.projectfloodlight.openflow.protocol.OFBarrierRequest;