FireFly v0.13.0 is not specifying a name for subscriptions

[peterbroadhurst]

In this change:
98890dc

We moved to use the flat POST /subscriptions route on EthConnect, rather than requiring an ABI to be deployed to EthConnect first.

However, we seem to have missed specifying the name when we create it - so this check fails on every startup, and we're creating duplicate subscriptions for the same event:

firefly/internal/blockchain/ethereum/eventstream.go

Lines 177 to 185 in a435374

	for _, s := range existingSubs {
	if s.Name == subName ||
	/* Check for the plain name we used to use originally, before adding uniqueness qualifier.
	If one of these very early environments needed a new subscription, the existing one would need to
	be deleted manually. */
	s.Name == abi.Name {
	sub = s
	}
	}