[FAB-1781] Fix failing test in multichain package
[FAB-1781] Fix failing test in multichain package

https://jira.hyperledger.org/browse/FAB-1781

Changesets [1] and [2] got merged and as a result a test in the
`multichain` package fails.

This changeset fixes the failing test.

[1] https://gerrit.hyperledger.org/r/3867
[2] https://gerrit.hyperledger.org/r/4581

Change-Id: I2dfc6403f79914943107a77b587791800ac053eb
Signed-off-by: Kostas Christidis <e1a8399e36effe75a124102eb2a2bdfc82e0aab4@christidis.io>

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