Get all cm handles by DMI plugin Identifier

- api added to get cm handles by dmi plugin identifier
- response object refactored from RestOutputCmHandle to collection of
  Strings (cm handle ids)
- added public and private methods in CmHandleQueries to get cm handle ID by dmi plugin
- added unit tests including test to show that there are no duplicates
  on response

Issue-ID: CPS-1136
Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>
Change-Id: Ia3bdc16172a90ad3a3f9ae11cddcad1352188726
diff --git a/cps-ncmp-rest/docs/openapi/openapi-inventory.yml b/cps-ncmp-rest/docs/openapi/openapi-inventory.yml
index ee09d05..08270bc 100755
--- a/cps-ncmp-rest/docs/openapi/openapi-inventory.yml
+++ b/cps-ncmp-rest/docs/openapi/openapi-inventory.yml
@@ -1,5 +1,6 @@
 #  ============LICENSE_START=======================================================
 #  Copyright (C) 2021 Bell Canada
+#  Modifications Copyright (C) 2022 Nordix Foundation
 #  ================================================================================
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -26,3 +27,6 @@
 paths:
   /v1/ch:
     $ref: 'ncmp-inventory.yml#/updateDmiRegistration'
+
+  /v1/ch/cmHandles:
+    $ref: 'ncmp-inventory.yml#/getAllCmHandleIdsForRegisteredDmi'
\ No newline at end of file