Rename WebappTest to WebappSuite and move it to webapp.utils

jvm/src/test/scala/cs214/webapp/server/WebappTest.scala → jvm/src/test/scala/cs214/webapp/utils/WebappTest.scala

-package cs214.webapp.server
+package cs214.webapp.utils
 
 import java.net.URI
 import java.net.http.HttpRequest
@@ -8,7 +8,7 @@ import cs214.webapp.*
 import cs214.webapp.server.StateMachine
 
 /** Abstract test suite to help testing logic of Webapps */
-abstract class WebappTest[Event, State, View] extends munit.FunSuite:
+abstract class WebappSuite[Event, State, View] extends munit.FunSuite:
 
   protected val UID0: String = "yak"
   protected val UID1: String = "hut"
@@ -17,6 +17,8 @@ abstract class WebappTest[Event, State, View] extends munit.FunSuite:
   /** Mock user IDs that can be used in tests */
   protected val USER_IDS = Seq(UID0, UID1, UID2)
 
+  protected val RNG = util.Random(0)
+
   /** Your app logic */
   val sm: StateMachine[Event, State, View]