RestTemplate interceptors not in sync with HttpEndpointConfiguration

**Citrus Version**
2.8.0

**Expected behavior**
CitrusEndpoints.http()..interceptor(myInterceptor).build() should result in HttpEndpointConfiguration's restTemplate's interceptors to contain myInterceptor.

**Actual behavior**
restTemplate calls do not invoke myInterceptor because it's not added to the collection. (was working in citrus-http-2.6.2)

**Test case sample**
> Please, share the test case (as small as possible) which shows the issue
In context have
@Bean(name = "myClient")
public HttpClient myClient(ClientHttpRequestFactory oAuthHttpClientRequestFactory,
OAuthRestClientInterceptor oAuthRestClientInterceptor) {
return CitrusEndpoints
.http()
.client()
.requestUrl(baseUrl)
.requestFactory(oAuthHttpClientRequestFactory)
.interceptor(oAuthRestClientInterceptor)
.build();
}
...
`When sends message `
...
put breakpoint at com.consol.citrus.http.client.HttpEndpointConfiguration#getRestTemplate
evaluate expression: this.restTemplate.interceptors.size() == 0
result is: true / call fails due to lack of Interceptor.