Correct documentation for GET node API

	- Add new section on documentation to describe XPath
	- Correct doc description on GET node API

Issue-ID: CPS-1607
Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>
Change-Id: I23e4ccd1185a2d93fbb0b9e02e9daab949c0f952
diff --git a/cps-rest/docs/openapi/components.yml b/cps-rest/docs/openapi/components.yml
index da43743..a7c1300 100644
--- a/cps-rest/docs/openapi/components.yml
+++ b/cps-rest/docs/openapi/components.yml
@@ -191,7 +191,7 @@
     xpathInQuery:
       name: xpath
       in: query
-      description: For more details on xpath, please refer https://docs.onap.org/projects/onap-cps/en/latest/cps-path.html
+      description: For more details on xpath, please refer https://docs.onap.org/projects/onap-cps/en/latest/xpath.html
       required: false
       schema:
         type: string
@@ -204,7 +204,7 @@
     requiredXpathInQuery:
       name: xpath
       in: query
-      description: For more details on xpath, please refer https://docs.onap.org/projects/onap-cps/en/latest/cps-path.html
+      description: For more details on xpath, please refer https://docs.onap.org/projects/onap-cps/en/latest/xpath.html
       required: true
       schema:
         type: string