Modified the 1.5.2 CHANGELOG for rc2.

(cherry picked from commit a9196e877051c696a1e3ee1b432fe75eb6391b67)
diff --git a/CHANGELOG b/CHANGELOG
index 304513b..89354c8 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,15 +1,3 @@
-Release Notes - Mesos - Version 1.5.3 (WIP)
--------------------------------------------
-* This is a bug fix release.
-
-** Bug
-  * [MESOS-8907] - Docker image fetcher fails with HTTP/2.
-  * [MESOS-9334] - Container stuck at ISOLATING state due to libevent poll never returns.
-
-** Improvement
-  * [MESOS-9305] - Create cgoup recursively to workaround systemd deleting cgroups_root.
-
-
 Release Notes - Mesos - Version 1.5.2
 -------------------------------------
 * This is a bug fix release.
@@ -25,6 +13,7 @@
   * [MESOS-8871] - Agent may fail to recover if the agent dies before image store cache checkpointed.
   * [MESOS-8904] - Master crash when removing quota.
   * [MESOS-8906] - `UriDiskProfileAdaptor` fails to update profile selectors.
+  * [MESOS-8907] - Docker image fetcher fails with HTTP/2.
   * [MESOS-8917] - Agent leaking file descriptors into forked processes.
   * [MESOS-8921] - Autotools don't work with newer OpenJDK versions.
   * [MESOS-8935] - Quota limit "chopping" can lead to cpu-only and memory-only offers.
@@ -56,7 +45,9 @@
   * [MESOS-9267] - Mesos agent crashes when CNI network is not configured but used.
   * [MESOS-9279] - Docker Containerizer 'usage' call might be expensive if mount table is big.
   * [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-9334] - Container stuck at ISOLATING state due to libevent poll never returns.
 
 
 Release Notes - Mesos - Version 1.5.1