Fixed the CHANGELOG for 1.5.2.

(cherry picked from commit 2aaf96ecbab316708afb401e43cad2f2f692f687)
diff --git a/CHANGELOG b/CHANGELOG
index 08bbb74..edbb742 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,23 +1,10 @@
-Release Notes - Mesos - Version 1.5.3 (WIP)
--------------------------------------------
-* This is a bug fix release.
-
-** Bug
-  * [MESOS-7474] - Mesos fetcher cache doesn't retry when missed.
-  * [MESOS-9317] - Some master endpoints do not handle failed authorization properly.
-  * [MESOS-9332] - Nested container should run as the same user of its parent container by default.
-  * [MESOS-9411] - Validation of JWT tokens using HS256 hashing algorithm is not thread safe.
-  * [MESOS-9419] - Executor to framework message crashes master if framework has not re-registered.
-  * [MESOS-9492] - Persist CNI working directory across reboot.
-  * [MESOS-9518] - CNI_NETNS should not be set for orphan containers that do not have network namespace.
-
-
 Release Notes - Mesos - Version 1.5.2
 -------------------------------------
 * This is a bug fix release.
 
 ** Bug
   * [MESOS-3790] - ZooKeeper connection should retry on `EAI_NONAME`.
+  * [MESOS-7474] - Mesos fetcher cache doesn't retry when missed.
   * [MESOS-8128] - Make os::pipe file descriptors O_CLOEXEC.
   * [MESOS-8418] - mesos-agent high cpu usage because of numerous /proc/mounts reads.
   * [MESOS-8545] - AgentAPIStreamingTest.AttachInputToNestedContainerSession is flaky.
@@ -61,14 +48,20 @@
   * [MESOS-9283] - Docker containerizer actor can get backlogged with large number of containers.
   * [MESOS-9305] - Create cgoup recursively to workaround systemd deleting cgroups_root.
   * [MESOS-9308] - URI disk profile adaptor could deadlock.
+  * [MESOS-9317] - Some master endpoints do not handle failed authorization properly.
+  * [MESOS-9332] - Nested container should run as the same user of its parent container by default.
   * [MESOS-9334] - Container stuck at ISOLATING state due to libevent poll never returns.
+  * [MESOS-9411] - Validation of JWT tokens using HS256 hashing algorithm is not thread safe.
+  * [MESOS-9419] - Executor to framework message crashes master if framework has not re-registered.
   * [MESOS-9480] - Master may skip processing authorization results for `LAUNCH_GROUP`.
+  * [MESOS-9492] - Persist CNI working directory across reboot.
   * [MESOS-9501] - Mesos executor fails to terminate and gets stuck after agent host reboot.
   * [MESOS-9502] - IOswitchboard cleanup could get stuck due to FD leak from a race.
 
 ** Improvement:
   * [MESOS-9510] - Disallowed nan, inf and so on in `Value::Scalar`.
   * [MESOS-9516] - Extend `min_allocatable_resources` flag to cover non-scalar resources.
+  * [MESOS-9518] - CNI_NETNS should not be set for orphan containers that do not have network namespace.
 
 
 Release Notes - Mesos - Version 1.5.1