Moved AdminServer to proper package.

- Converted to Kotlin since I saw this was an option now here.

components/proxy/src/main/kotlin/com/hotels/styx/server/AdminHttpRouter.kt

@@ -0,0 +1,62 @@
+/*
+  Copyright (C) 2013-2019 Expedia Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+ */
+package com.hotels.styx.server
+
+import com.hotels.styx.api.Eventual
+import com.hotels.styx.api.HttpHandler
+import com.hotels.styx.api.HttpInterceptor
+import com.hotels.styx.api.LiveHttpRequest
+import com.hotels.styx.api.LiveHttpResponse
+import com.hotels.styx.api.WebServiceHandler
+import com.hotels.styx.common.http.handler.HttpAggregator
+
+import com.hotels.styx.api.HttpResponse.response
+import com.hotels.styx.api.HttpResponseStatus.NOT_FOUND
+
+class AdminHttpRouter : HttpHandler {
+
+    private val routes = PathTrie<HttpHandler>()
+
+    override fun handle(
+        request: LiveHttpRequest,
+        context: HttpInterceptor.Context
+    ): Eventual<LiveHttpResponse> {
+        return routes.get(request.path())
+            .orElse(NOT_FOUND_HANDLER)
+            .handle(request, context)
+    }
+
+    fun aggregate(
+        path: String,
+        httpHandler: WebServiceHandler
+    ): AdminHttpRouter {
+        routes.put(path, HttpAggregator(MEGABYTE, httpHandler))
+        return this
+    }
+
+    fun stream(
+        path: String,
+        httpHandler: HttpHandler
+    ): AdminHttpRouter {
+        routes.put(path, httpHandler)
+        return this
+    }
+
+    companion object {
+        private const val MEGABYTE = 1024 * 1024
+        private val NOT_FOUND_HANDLER = HttpHandler {  _, _ -> Eventual.of(response(NOT_FOUND).build().stream()) }
+    }
+}