[Blackbird] Fixing Intent purge case (ONOS-1207)

Master needs to remove from the current map.

Change-Id: I30eccbe188997949ef2d63d6dbd37b0d8d4b3f5e
diff --git a/core/net/src/main/java/org/onosproject/net/intent/impl/phase/IntentProcessPhase.java b/core/net/src/main/java/org/onosproject/net/intent/impl/phase/IntentProcessPhase.java
index 5f7412b..dfa9d11 100644
--- a/core/net/src/main/java/org/onosproject/net/intent/impl/phase/IntentProcessPhase.java
+++ b/core/net/src/main/java/org/onosproject/net/intent/impl/phase/IntentProcessPhase.java
@@ -56,6 +56,8 @@
                 } else {
                     return new WithdrawRequest(processor, data, current);
                 }
+            case PURGE_REQ:
+                return new PurgeRequest(data, current);
             default:
                 // illegal state
                 return new CompilingFailed(data);