Remove methods deprecated in Drake from L2ModificationInstruction API

Change-Id: I30dbc2e9c590d4bc2bc672e13581dbd1c3b3561b
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
index 8557f17..296f7e4 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
@@ -413,7 +413,7 @@
             case MPLS_LABEL:
                 ModMplsLabelInstruction mplsLabel =
                         (ModMplsLabelInstruction) l2m;
-                oxm = factory().oxms().mplsLabel(U32.of(mplsLabel.mplsLabel().toInt()));
+                oxm = factory().oxms().mplsLabel(U32.of(mplsLabel.label().toInt()));
                 break;
             case MPLS_BOS:
                 ModMplsBosInstruction mplsBos = (ModMplsBosInstruction) l2m;