Fix & convert e2e tests (#1167)

* split off rx-query tests

* Split off promise-rx tests

* use funded bob_stash for alex

* Fixed transfer e2e tests pt. 1

* wip era tx

* split derive promises

* delete outdated e2e metadata tests

* add randomAsHex test files

* WIP

* tslint

* add index file to e2e util

* rx-tx tests

* eslint types

* linting

* contract ? storage tests

* promise-contract tests

* fix lint errors after merge

* re-implement lost merge changes

* Only support recent ink versions

* child-storage tests

* Add e2e tests for storage input type

* All tests passing for rpc-core

* linting

* wrong file path

* remove old contract files & change folder name

* added larger random as hex files

docker-compose.yml

@@ -62,7 +62,7 @@ services:
       - "--ws-external"
       - "--rpc-external"
   
-  pokadot-master:
+  polkadot-master:
     image: parity/polkadot:latest
     ports:
       - "9948:9944"
@@ -74,7 +74,7 @@ services:
       - "--ws-external"
       - "--rpc-external"
 
-  pokadot-alexander:
+  polkadot-alexander:
       image: parity/polkadot:v0.4.4
       ports:
         - "9949:9944"