enhanced redeem: missing issuer registration in the topology

[adecaro]

Currently, the topologies of the integration tests do not add the issuers to the TMS. The test are still working because when no issuers are defined any node can issue.

An issuer node must be registered at a TMS by using the following: tms.AddIssuer(issuer), where tms is the topology's TMS and issuer is the FSC node equipped with an issuer identity.

This Github Issue asks to fix this.

[barvhaim]

We've added that and seems to work, getting the issuer in PublicParams