默认情况下，Rest Assured 3.x被添加到类路径中。但是，要使用Rest Assured 2.x，可以将其添加到插件的classpath中，如下所示：

buildscript {
	repositories {
		mavenCentral()
	}
	dependencies {
	    classpath "org.springframework.boot:spring-boot-gradle-plugin:${springboot_version}"
		classpath "org.springframework.cloud:spring-cloud-contract-gradle-plugin:${verifier_version}"
		classpath "com.jayway.restassured:rest-assured:2.5.0"
		classpath "com.jayway.restassured:spring-mock-mvc:2.5.0"
	}
}

depenendencies {
    // all dependencies
    // you can exclude rest-assured from spring-cloud-contract-verifier
    testCompile "com.jayway.restassured:rest-assured:2.5.0"
    testCompile "com.jayway.restassured:spring-mock-mvc:2.5.0"
}

这样，插件会自动看到类路径中存在Rest Assured 2.x，并相应地修改了导入。