fix import

Author: Sankar Periyathambi Neelakandan

integration-tests/src/test/java/oracle/kubernetes/operator/ITMultipleClusters.java

@@ -16,6 +16,7 @@
 import oracle.kubernetes.operator.utils.Operator;
 import oracle.kubernetes.operator.utils.TestUtils;
 import org.junit.AfterClass;
+import org.junit.Assume;
 import org.junit.BeforeClass;
 import org.junit.FixMethodOrder;
 import org.junit.Test;