Disable Parity websockets tests

[vbaranov]

Motivation

Disable Parity WebSockets tests since we closed access to the archive node

Changelog

Change circle CI config

Checklist for your Pull Request (PR)

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
• I checked whether I should update the docs and did so by submitting a PR to https://github.com/blockscout/docs
• If I added/changed/removed ENV var, I submitted a PR to https://github.com/blockscout/docs to update the list of env vars at https://github.com/blockscout/docs/blob/master/for-developers/information-and-settings/env-variables.md and I updated the version to master in the Version column. Changes will be reflected in this table: https://docs.blockscout.com/for-developers/information-and-settings/env-variables.
• If I add new indices into DB, I checked, that they are not redundant with PGHero or other tools

[coveralls]

Pull Request Test Coverage Report for Build b2ca92a7-b324-4abb-8400-1b30893d5b15

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 76 unchanged lines in 8 files lost coverage.
• Overall coverage decreased (-1.05%) to 75.1%

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Files with Coverage Reduction	New Missed Lines	%
apps/block_scout_web/lib/block_scout_web/controllers/chain/market_history_chart_controller.ex	1	78.57%
apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/http/httpoison.ex	1	0.0%
apps/ethereum_jsonrpc/test/support/ethereum_jsonrpc/case/parity/http_websocket.ex	1	0.0%
apps/indexer/lib/indexer/transform/addresses.ex	1	75.0%
apps/indexer/lib/indexer/block/fetcher.ex	3	83.13%
apps/ethereum_jsonrpc/test/support/ethereum_jsonrpc/web_socket/case/parity.ex	4	0.0%
apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/http.ex	12	52.0%
apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/web_socket/web_socket_client.ex	53	11.25%

Totals
Change from base Build 9b831152-1f8d-4300-9c6d-152576bd110c:	-1.05%
Covered Lines:	5281
Relevant Lines:	7032

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💛 - Coveralls