[configadmin] update changelog
+Changes in 1.9.10
+-----------------
+** Bug
+ * [FELIX-5962] - Exception during event processing leaves CM threads alive and holding the JVM running during framework shutdown
+
+** New Feature
+ * [FELIX-5951] - Automatically add ConfigurationAdmin service as a shell command
+
+
Changes in 1.9.8
----------------
** Bug
