refactor http client config for scanners #841

could not import github.com/KyberNetwork/kyberswap-dex-lib/pkg/source/limitorder (-: # github.com/KyberNetwork/kyberswap-dex-lib/pkg/source/limitorder

ci / lint: pkg/source/limitorder/pool_tracker.go#L19

undefined: httpClient

ci / lint: pkg/source/limitorder/pool_tracker.go#L23

undefined: NewHTTPClient

ci / lint: pkg/source/limitorder/pools_list_updater.go#L17

undefined: httpClient

ci / lint: pkg/source/limitorder/pools_list_updater.go#L25

undefined: NewHTTPClient

ci / lint: pkg/source/limitorder/rfq.go#L18

undefined: httpClient

ci / lint: pkg/source/limitorder/rfq.go#L22

undefined: NewHTTPClient) (typecheck)

ci / lint: pkg/pooltypes/pooltypes.go#L98

could not import github.com/KyberNetwork/kyberswap-dex-lib/pkg/source/limitorder (-: # github.com/KyberNetwork/kyberswap-dex-lib/pkg/source/limitorder

ci / lint: pkg/source/limitorder/pool_tracker.go#L19

undefined: httpClient

ci / lint: pkg/source/limitorder/pool_tracker.go#L23

undefined: NewHTTPClient

ci / test

Canceling since a higher priority waiting request for 'ci-workflow-refs/pull/694/merge-pull_request' exists

ci / test: pkg/source/limitorder/pool_tracker.go#L19

undefined: httpClient

ci / test: pkg/source/limitorder/pool_tracker.go#L23

undefined: NewHTTPClient

ci / test: pkg/source/limitorder/pools_list_updater.go#L17

undefined: httpClient