title: traceId and spanId are coming as same throughout the loggers
body: <p>Using a Spring boot with below gradle dependency to get the Sleuth's trace &amp; span, although I am getting trace &amp; span id's in my logs but they both are same, like even in controller &amp; service class they are same.</p>
  <p>gradle.build :</p>
  <pre><code>compile('org.springframework.boot:spring-boot-starter:2.1.4.RELEASE')
  compile 'org.springframework.cloud:spring-cloud-starter-sleuth:2.1.4.RELEASE'
  </code></pre>
  <p>logback.xml:</p>
  <pre><code>&lt;property name=&quot;CONSOLE_LOG_PATTERN&quot;
            value=&quot;%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level  trace=%X{X-B3-TraceId} span=%X{X-B3-SpanId} MSG=%m%n&quot;/&gt;
  </code></pre>
  <p>Aspect class :</p>
  <pre><code>@Around(&quot;execution(*  com.test.common.controller.*.*(..))&quot;)
  public Object controllerAspect(ProceedingJoinPoint joinPoint) throws Throwable {
      Long startTime = System.currentTimeMillis();
      RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
      if (requestAttributes == null) {
          return joinPoint.proceed();
      }
      HttpServletRequest httpServletRequest = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
      myLoggingServices(joinPoint, requestAttributes, httpServletRequest, startTime);
      return joinPoint.proceed();
  }
  </code></pre>
  <p>console logs :</p>
  <pre><code>2021-07-16 13:41:56.008 [qtp1043203786-34] INFO   trace=474376a508632a04 span=474376a508632a04 qualifiedClass=com.test.common.controller.MyController time=14
  
  2021-07-16 13:41:56.009 [qtp1043203786-34] INFO   trace=474376a508632a04 span=474376a508632a04 qualifiedClass=com.test.common.controller.MyController time=1
  
  2021-07-16 13:41:56.291 [qtp1043203786-34] INFO   trace=474376a508632a04 span=474376a508632a04 qualifiedClass=com.test.common.service.impl.MyServiceImpl time=0
  
  2021-07-16 13:41:56.292 [qtp1043203786-34] INFO   trace=474376a508632a04 span=474376a508632a04 qualifiedClass=com.test.common.service.impl.MyServiceImpl time=0
  
  </code></pre>
  <p>Is there anything missing that I should add, please see that Spring boot version is fixed due to app dependency.</p>