Few core changes in preparation of P4Runtime subsystem refactoring

Refactoring aims at providing a more robust connection procedure of
P4Runtime-based devices.

Refactoring requires devices to be registered to the core with
available=false (i.e. offline), and marked online only when the P4
pipeline has been deployed to the device. Also, it leaves the duty of
handling pipeconf-specific drivers to the driver subsystem, instead of
having the GeneralDeviceProvider take care of it, which resulted to be
brittle.

Changes include:
- Choose not to mark device online when re-asserting mastership role by
declaring special device annotation.
- Lookup drivers in device projectable model unsing driver service
device-based method, which is consistent with the way other subsystems
look for device drivers.
- In DriverManager, when looking for device drivers, consider the case
of pipeconf-programmable devices, in which case a special "merged"
driver needs to instantiated at runtime.
- In PacketManager, push flow objectives only if device is available
(i.e. after pipeline has been deployed).

Change-Id: I80f78a4f40730a06cb82fa55fefab08a91a89268
diff --git a/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java b/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java
index 3697641..f4549c5 100644
--- a/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java
+++ b/core/net/src/test/java/org/onosproject/net/flow/impl/FlowRuleManagerTest.java
@@ -39,6 +39,7 @@
 import org.onosproject.net.Device.Type;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.MastershipRole;
+import org.onosproject.net.config.NetworkConfigServiceAdapter;
 import org.onosproject.net.device.DeviceServiceAdapter;
 import org.onosproject.net.driver.AbstractHandlerBehaviour;
 import org.onosproject.net.driver.DefaultDriver;
@@ -51,7 +52,6 @@
 import org.onosproject.net.flow.FlowEntry;
 import org.onosproject.net.flow.FlowEntry.FlowEntryState;
 import org.onosproject.net.flow.FlowRule;
-import org.onosproject.net.flow.oldbatch.FlowRuleBatchOperation;
 import org.onosproject.net.flow.FlowRuleEvent;
 import org.onosproject.net.flow.FlowRuleListener;
 import org.onosproject.net.flow.FlowRuleProgrammable;
@@ -66,6 +66,8 @@
 import org.onosproject.net.flow.instructions.Instruction;
 import org.onosproject.net.flow.instructions.Instructions;
 import org.onosproject.net.flow.instructions.Instructions.MetadataInstruction;
+import org.onosproject.net.flow.oldbatch.FlowRuleBatchOperation;
+import org.onosproject.net.pi.PiPipeconfServiceAdapter;
 import org.onosproject.net.provider.AbstractProvider;
 import org.onosproject.net.provider.ProviderId;
 import org.onosproject.store.trivial.SimpleFlowRuleStore;
@@ -84,9 +86,16 @@
 import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicLong;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
 import static org.onosproject.net.NetTestTools.injectEventDispatcher;
-import static org.onosproject.net.flow.FlowRuleEvent.Type.*;
+import static org.onosproject.net.flow.FlowRuleEvent.Type.RULE_ADDED;
+import static org.onosproject.net.flow.FlowRuleEvent.Type.RULE_ADD_REQUESTED;
+import static org.onosproject.net.flow.FlowRuleEvent.Type.RULE_REMOVED;
+import static org.onosproject.net.flow.FlowRuleEvent.Type.RULE_REMOVE_REQUESTED;
+import static org.onosproject.net.flow.FlowRuleEvent.Type.RULE_UPDATED;
 
 /**
  * Test codifying the flow rule service & flow rule provider service contracts.
@@ -712,6 +721,8 @@
         TestDriverManager(DriverRegistry registry) {
             this.registry = registry;
             this.deviceService = mgr.deviceService;
+            this.pipeconfService = new PiPipeconfServiceAdapter();
+            this.networkConfigService = new NetworkConfigServiceAdapter();
             activate();
         }
     }