SONAR suggestion - proper handling of InterruptedException

Change-Id: I67a93c064708c207d9ce83fac319682c2d17db60
diff --git a/apps/test/primitive-perf/src/main/java/org/onosproject/primitiveperf/PrimitivePerfApp.java b/apps/test/primitive-perf/src/main/java/org/onosproject/primitiveperf/PrimitivePerfApp.java
index 5e8900a..256edfc 100644
--- a/apps/test/primitive-perf/src/main/java/org/onosproject/primitiveperf/PrimitivePerfApp.java
+++ b/apps/test/primitive-perf/src/main/java/org/onosproject/primitiveperf/PrimitivePerfApp.java
@@ -256,6 +256,7 @@
                 workers.awaitTermination(10, TimeUnit.MILLISECONDS);
             } catch (InterruptedException e) {
                 log.warn("Failed to stop worker", e);
+                Thread.currentThread().interrupt();
             }
         }