Get all cm handles by DMI plugin Identifier

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