* test that successfully verify self-generated proof

* verify proof result on all unpaused nodes

* tighten interface: reuse connection

* generate the proof on arbitrary node

* s/stub-name/validator

seems this doesn't pass some regex

* rename script

* add basic mmr-leaves test

* documentation formatting

* check lower bound on mmr leaves

* test beefy rpc: finalized heads match

* test mmr api: stateless proofs

* set lower bound on number of leaves

* change leaves in proof generation

* remove TODOs

* cleanup: consistently ignore zndsl name arg

* refactor: simplify returns

Co-authored-by: Serban Iorga <serban@parity.io>

* lax finalized head test

Co-authored-by: Adrian Catangiu <adrian@parity.io>

* fixup! refactor: simplify returns

* refactor out getApis

Co-authored-by: Serban Iorga <serban@parity.io>

* split out paused validator from group

* refactor: don't ignore node arg

don't randomize selection of...