Use .nest() instead of .route() in Kotlin Web DSL

The goal is to have better consistency between Java
and Kotlin functional Web API.

spring-webflux/src/main/kotlin/org/springframework/web/reactive/function/server/RouterFunctionExtensions.kt

@@ -80,11 +80,11 @@ class RouterDsl {
 
 	operator fun RequestPredicate.not(): RequestPredicate = this.negate()
 
-	fun RequestPredicate.route(r: Routes) {
+	fun RequestPredicate.nest(r: Routes) {
 		routes += RouterFunctions.nest(this, RouterDsl().apply(r).router())
 	}
 
-	fun String.route(r: Routes) {
+	fun String.nest(r: Routes) {
 		routes += RouterFunctions.nest(pathPrefix(this), RouterDsl().apply(r).router())
 	}
 

spring-webflux/src/test/kotlin/org/springframework/web/reactive/function/server/RouterFunctionExtensionsTests.kt

@@ -107,7 +107,7 @@ class RouterFunctionExtensionsTests {
 
 	fun sampleRouter() = router {
 		(GET("/foo/") or GET("/foos/")) { req -> handle(req) }
-		"/api".route {
+		"/api".nest {
 			POST("/foo/", ::handleFromClass)
 			PUT("/foo/", :: handleFromClass)
 			"/foo/"  { handleFromClass(it) }
@@ -115,7 +115,7 @@ class RouterFunctionExtensionsTests {
 		accept(APPLICATION_ATOM_XML, ::handle)
 		contentType(APPLICATION_OCTET_STREAM, ::handle)
 		method(PATCH, ::handle)
-		headers({ it.accept().contains(APPLICATION_JSON) }).route {
+		headers({ it.accept().contains(APPLICATION_JSON) }).nest {
 			GET("/api/foo/", ::handle)
 		}
 		headers({ it.header("bar").isNotEmpty() }, ::handle)