bug(oxtrust-api): attempt to update trust relationship removing existing attribute

[mzico]

Describe the issue

Using oxTrust-API to update an existing trust relationship. Existing attributes from this trust relationship are being removed.

Gluu Server: 4.5.6
oxTrust image: gluufederation/oxtrust:4.5.6-2

Steps To Reproduce

Steps to reproduce the behavior:

1. Let's assume we have a trust relationship whose inum is "2359e25b-8bfe-488e-8975-28c1a8f3ab8d"

2. This is a simple File based trust relationship where "Username" and "EmailAddress" attributes are being released.

3. We are making an API call to change this trust relationship's status from "Active" to "False"

4. API call information:
   4.1 PUT https://<hostname>/identity/restv1/api/v1/saml/tr/update/2359e25b-8bfe-488e-8975-28c1a8f3ab8d
   4.2 BODY:

        {
             "dn": "inum=2359e25b-8bfe-488e-8975-28c1a8f3ab8d,ou=trustRelationships,o=gluu",
             "inum": "2359e25b-8bfe-488e-8975-28c1a8f3ab8d",
             "displayName": "testappsaml2",
             "description": "Test application",
             "status": "INACTIVE",
             "validationStatus": "SUCCESS",
             "releasedAttributes": [
                 "inum=CAE3,ou=attributes,o=gluu",
                 "inum=42E0,ou=attributes,o=gluu"
             ],
             "spMetaDataSourceType": "FILE",
             "spMetaDataFN": "2359e25b-8bfe-488e-8975-28c1a8f3ab8d-sp-metadata.xml",
             "owner": "o=gluu",
             "maxRefreshDelay": "PT8H",
             "metadataFilters": {},
             "profileConfigurations": {},
             "gluuIsFederation": "false",
             "gluuEntityId": [
                 "https://testappsaml2.gluu.org/shibboleth"
             ],
             "entityType": "SingleSP"
         }
      ```
   

Expected behavior

Trust relationship updated with "Status == INACTIVE".

Actual behavior

Trust relationship update happening bug "Attributes Published" are null.