* Moved all e2e tests to 'api' folder
* Moved metadata test
* fix imports
* Add jest options for testing the different endpoint types separately
* Add check for empty test suites and return empt test to prevent jest from throwing an error
* Fix import paths
* Fix const tests for polkadot chains
* Update to latest Substrate 2.0 image
* Move contract files for e2e testing to e2e tesing folder
* reorder & fix promise query tests for all test nodes
* final fixes for promise query
* eslint fixes
* removed trailing space
* fix linting errors
* Address codeclimate "Function getWsEndpoints has a Cognitive Complexity of 7 (exceeds 5 allowed)."
* Fix contract ABI import paths
* linter endpoint types
* replace alice with alice_stash
* split off promise-queries file
* Remove apiType, smaller cleanups, added local to only: [] tests suites
* relative paths changed to `@polkadot` import
* moved contract wasm & abi's back to `api-contract`
Stefanie Doll
d57dca53f4