[issue-9355] fix error on e2e tests

[FrancescoMolinaro]

References

Fixes DSpace/DSpace#9355

Description

Handle error on remote data response

Instructions for Reviewers

Adapted retrieveCurrentUserSuggestions method to prevent error on missing data

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[tdonohue]

👍 Thanks @FrancescoMolinaro ! This fixes the e2e test failures.