Added code to intent unit tests to pre-emptively unbind ID generator to avoid cascading failures.

Change-Id: I2e5aff44a90ceeaaad71d7154b79f20edab620a7
diff --git a/apps/optical-model/src/test/java/org/onosproject/net/optical/intent/impl/compiler/OpticalCircuitIntentCompilerTest.java b/apps/optical-model/src/test/java/org/onosproject/net/optical/intent/impl/compiler/OpticalCircuitIntentCompilerTest.java
index 1c0eceb..1ce3e6c 100644
--- a/apps/optical-model/src/test/java/org/onosproject/net/optical/intent/impl/compiler/OpticalCircuitIntentCompilerTest.java
+++ b/apps/optical-model/src/test/java/org/onosproject/net/optical/intent/impl/compiler/OpticalCircuitIntentCompilerTest.java
@@ -377,6 +377,7 @@
         sut.intentService = new TestIntentService();
         sut.intentSetMultimap = new MockIntentSetMultimap();
 
+        Intent.unbindIdGenerator(idGenerator);
         Intent.bindIdGenerator(idGenerator);
 
         intentExtensionService = createMock(IntentExtensionService.class);