MINOR: Fix an incorrect assignment in StreamsUncaughtExceptionHandlerIntegrationTest (apache#18837)

This constructor was not initializing a field with the constructor
argument, the extra `} {` was ending the constructor body and creating
an instance initializer block that assigned the field to itself.

Reviewers: Matthias J. Sax <[email protected]>

Author: cushon

streams/integration-tests/src/test/java/org/apache/kafka/streams/integration/StreamsUncaughtExceptionHandlerIntegrationTest.java

@@ -183,17 +183,14 @@ public void shouldShutdownSingleThreadApplication() throws Exception {
 
     private static class ShutdownProcessor<KIn, VIn, KOut, VOut> implements Processor<KIn, VIn, KOut, VOut> {
 
-        private ProcessorContext<KOut, VOut> context;
-
         final List<String> valueList;
 
         ShutdownProcessor(final List<String> valueList) {
             this.valueList = valueList;
         }
 
         @Override
-        public void init(final ProcessorContext<KOut, VOut> context) {} {
-            this.context = context;
+        public void init(final ProcessorContext<KOut, VOut> context) {
         }
 
         @Override