Fix test

Author: Xtansia

Diff for: test/http-client-tests/src/main/java/software/amazon/awssdk/http/SdkHttpClientDefaultTestSuite.java

@@ -243,9 +243,7 @@ private void validateResponse(HttpExecuteResponse response,
                 .withHeader("Content-Length", equalTo("4"));
         } else {
             patternBuilder.withRequestBody(absent());
-            if (method == SdkHttpMethod.PATCH || method == SdkHttpMethod.POST || method == SdkHttpMethod.PUT) {
-                patternBuilder.withHeader("Content-Length", equalTo("0"));
-            } else {
+            if (method != SdkHttpMethod.PATCH && method != SdkHttpMethod.POST && method != SdkHttpMethod.PUT) {
                 patternBuilder.withoutHeader("Content-Length");
             }
         }