message: Replaced call to deprecated function.
  Replaced a call anoncreds.prover_get_credentials_for_proof_req whish is deprecated by the use of anoncreds.prover_search_credentials_for_proof_req.
diff: @@ -138,10 +138,13 @@ async def test_anoncreds_revocation_interaction_test_issuance_by_demand(pool_nam
  })
  # Prover Gets credentials for Proof Request
  - credential_for_proof_json = \
  - await anoncreds.prover_get_credentials_for_proof_req(prover_wallet_handle, proof_req_json)
  - credentials_for_proof = json.loads(credential_for_proof_json)
  - cred_info = credentials_for_proof['attrs']['attr1_referent'][0]['cred_info']
  + search_credentials_for_proof_handle = \
  + await anoncreds.prover_search_credentials_for_proof_req(prover_wallet_handle, proof_req_json, None)
  + fetched_credential_json = \
  + await anoncreds.prover_fetch_credentials_for_proof_req(search_credentials_for_proof_handle,
  + 'attr1_referent', 10)
  + await anoncreds.prover_close_credentials_search_for_proof_req(search_credentials_for_proof_handle)
  + cred_info = json.loads(fetched_credential_json)[0]['cred_info']
  # Prover Gets RevocationRegistryDelta from Ledger
  get_revoc_reg_delta_request = await ledger.build_get_revoc_reg_delta_request(prover_did, rev_reg_def_id, None, to)
  