fix: fixes TestE2ESimple failure by ensuring positive initial stake f…

…or validator (#3234)

Closes #3233
It sets the half of the initial token as the stake.

test/e2e/node.go

@@ -266,6 +266,7 @@ func (n *Node) GenesisValidator() genesis.Validator {
 		},
 		ConsensusKey: n.SignerKey,
 		NetworkKey:   n.NetworkKey,
+		Stake:        n.SelfDelegation / 2,
 	}
 }