fix(e2e): catchup round number is not correct

[lklimek]

Issue being fixed or feature implemented

Nodes sending proposal block parts for catchup loads them from the store.
Unfortunately, stored information didn't contain the round number, causing block part verification to fail when it belonged to any round different than 0.

Also, two other issues were detected and fixed:

• CurrentRoundState wasn't correctly initialized when the round changed
• e2e app didn't process correctly initial height different than 1

What was done?

• added round to BlockMeta
• ensure cs.RoundState.CurrentRoundState is reset when round changes
• e2e app: disabled height verification when at genesis

How Has This Been Tested?

• passed e2e tests
• passed unit tests

Breaking Changes

n/a

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[shotonoff]

Left some minor comments