network: make sure can publish and start a network with Gaia

[ilgooz]

We need to add an integration test for the network commands by using the Gaia repo as the chain.

I think starting the chain with two validators would be enough. One can be coordinator and other through another account. Then we start the network with these two and query height to see if it can generate blocks.

We can create an integration/network dir and add this test there. We also need to run an instance of SPN instead of connecting to nightly.

[ilgooz]

Can we also query the Node API to see if there are actually 2 validators?