Update architecture description for Honolulu

Updated architecture descrition to add CPS for Honolulu

Issue-ID: DOC-734

Signed-off-by: byungwoojun <byung-woo.jun@ericsson.com>
Change-Id: Iea30427ec85edc43d728f8302d972003e59e57ec
diff --git a/docs/guides/onap-developer/architecture/onap-architecture.rst b/docs/guides/onap-developer/architecture/onap-architecture.rst
index d94e428..0d1d7d6 100644
--- a/docs/guides/onap-developer/architecture/onap-architecture.rst
+++ b/docs/guides/onap-developer/architecture/onap-architecture.rst
@@ -414,18 +414,25 @@
 Shared Services
 ===============
 ONAP provides a set of operational services for all ONAP components including
-activity logging, reporting, common data layer, access control, secret and
-credential management, resiliency, and software lifecycle management.
+activity logging, reporting, common data layer, configuration, persistence, access control,
+secret and credential management, resiliency, and software lifecycle management.
 
 These services provide access management and security enforcement, data backup,
-restoration and recovery. They support standardized VNF interfaces and
-guidelines.
+configuration persistence, restoration and recovery. They support standardized
+VNF interfaces and guidelines.
 
 Operating in a virtualized environment introduces new security challenges and
 opportunities. ONAP provides increased security by embedding access controls in
 each ONAP platform component, augmented by analytics and policy components
 specifically designed for the detection and mitigation of security violations.
 
+Configuration Persistence Service (CPS)
+---------------------------------------
+The Configuration Persistence Service (CPS) provides storage for real-time run-time configuration
+and operational parameters that need to be used by ONAP.
+In R8, Honolulu, the CPS is a stand-alone component, and its details in
+:ref:`CPS - Configuration Persistence Service<onap-cps:architecture>`.
+
 ONAP Modeling
 =============
 ONAP provides models to assist with service design, the development of ONAP