do not stich json rpc config into module

[ayrat555]

Env vars are set after compilation so it causes @json_rpc_named_arguments to be nil

Changelog

• do not stich json rpc config into module

[coveralls]

Pull Request Test Coverage Report for Build 976fb131-7256-46c3-99e3-76173145e4a0

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 75 unchanged lines in 7 files lost coverage.
• Overall coverage decreased (-1.06%) to 75.068%

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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/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 d61d07ad-6958-4a5c-8299-e45e7f15aabb:	-1.06%
Covered Lines:	5263
Relevant Lines:	7011

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💛 - Coveralls

[pasqu4le]

CHANGELOG entry is missing BTW