zetacore : Add import data to the e2e test

[kingpinXD]

Add an option to the e2etest to use data exported from a mainnet or testnet node.

[kingpinXD]

I tried it out on the current mainnet data, and it works as expected.
I will raise a pr after the mainnet is upgraded to v15 , and I am able to run through the test with a v15 export , which adds a new module and so the state export is data is slightly different

[lumtis]

@kingpinXD v16 you mean?

which adds a new module
There are 2 modules added authority and lightclient

[kingpinXD]

Not sure, the v15 upgrade handler already adds the two modules

node/app/setup_handlers.go

Lines 31 to 34 in 93c12e0

	if upgradeInfo.Name == releaseVersion && !app.UpgradeKeeper.IsSkipHeight(upgradeInfo.Height) {
	storeUpgrades := storetypes.StoreUpgrades{
	Added: []string{authoritytypes.ModuleName, lightclienttypes.ModuleName},
	}

If in case the handler needs to be changed, then yes, it would make sense to to wait till v16

[lumtis]

Because the version has not been updated for the new version. We need to set v16 in the v16.0.0-rc branch