Fix copy-paste bug in setting socket options

Author: rschmitt

httpcore5-testing/src/test/java/org/apache/hc/core5/testing/nio/Http1CoreTransportTest.java

@@ -90,6 +90,8 @@ public Http1CoreTransportTest(final URIScheme scheme, final String tlsProtocol)
                 .setIOReactorConfig(
                         IOReactorConfig.custom()
                                 .setSoTimeout(TIMEOUT)
+                                .setTcpKeepIdle(5)
+                                .setTcpKeepInterval(3)
                                 .build())
                 .setRequestRouter(RequestRouter.<Supplier<AsyncServerExchangeHandler>>builder()
                         .addRoute(RequestRouter.LOCAL_AUTHORITY, "*", () -> new EchoHandler(2048))

httpcore5/src/main/java/org/apache/hc/core5/reactor/SingleCoreIOReactor.java

@@ -307,7 +307,7 @@ private void prepareSocket(final SocketChannel socketChannel) throws IOException
         if (this.reactorConfig.getTcpKeepInterval() > 0) {
             setExtendedSocketOption(socketChannel, SocketSupport.TCP_KEEPINTERVAL, this.reactorConfig.getTcpKeepInterval());
         }
-        if (this.reactorConfig.getTcpKeepInterval() > 0) {
+        if (this.reactorConfig.getTcpKeepCount() > 0) {
             setExtendedSocketOption(socketChannel, SocketSupport.TCP_KEEPCOUNT, this.reactorConfig.getTcpKeepCount());
         }
     }