twitter-server: Move ClientProfile to its Own File

Problem / Solution

The `ClientRegistryHandler` provides multiple views
into how downstream clients are performing, yet very
little of the logic is reusable. Let's break off the
`ClientProfile` and treat it as an actual model of the
data.

JIRA Issues: CSL-9011

Differential Revision: https://phabricator.twitter.biz/D391923

server/src/main/scala/com/twitter/server/handler/ClientRegistryHandler.scala

@@ -5,6 +5,7 @@ import com.twitter.finagle.client.{ClientRegistry, EndpointRegistry}
 import com.twitter.finagle.http.{Request, Response}
 import com.twitter.finagle.util.StackRegistry
 import com.twitter.io.Buf
+import com.twitter.server.model.ClientProfile
 import com.twitter.server.util.HtmlUtils.escapeHtml
 import com.twitter.server.util.HttpUtils.{parse, new404, newResponse}
 import com.twitter.server.util.MetricSource
@@ -15,13 +16,6 @@ private object ClientRegistryHandler {
 
   private lazy val emptyEntry = Some(MetricSource.Entry("", 0.0, 0.0))
 
-  case class ClientProfile(
-    name: String,
-    addr: String,
-    scope: String,
-    successRate: Double,
-    unavailable: Int)
-
   val profileOrdering: Ordering[ClientProfile] = Ordering.by(_.successRate)
 
   def prettyRate(sr: Double): String =

server/src/main/scala/com/twitter/server/model/ClientProfile.scala

@@ -0,0 +1,14 @@
+package com.twitter.server.model
+
+/**
+ * ClientProfile is used to represent data
+ * displayed in the "Least Performant
+ * Downstream Clients" section of the Twitter
+ * Server Admin Interface.
+ */
+private[server] case class ClientProfile(
+  name: String,
+  addr: String,
+  scope: String,
+  successRate: Double,
+  unavailable: Int)