Custom rest_client_options via Conjur configuration

[doodlesbykumbi]

What does this PR do?

This replaces the monkey patch to RestClient::Request that made it always uses :ssl_cert_store, which polluted into usage of RestClient outside the scope of Conjur. The new approach provides a sane default that retains the previous behavior, and gives the user the ability to configure RestClient::Requests scoped only to Conjur.

What ticket does this PR close?

Connected to https://github.com/cyberark/conjur-api-ruby/issues/188

Checklists

Change log

• [x] The CHANGELOG has been updated, or
• [ ] This PR does not include user-facing changes and doesn't require a CHANGELOG update

Test coverage

• [x] This PR includes new unit and integration tests to go with the code changes, or
• [ ] The changes in this PR do not require tests

Documentation

• [x] Docs (e.g. READMEs) were updated in this PR, and/or there is a follow-on issue to update docs, or
• [ ] This PR does not require updating any documentation

[fmang]

That does the trick for me. I checked that the previous approach with OpenSSL::SSL::SSLContext::DEFAULT_CERT_STORE.add_file still works, and that the new approach with Conjur.configuration.rest_client_options = { ssl_ca_file: 'my_cert.crt' } works too. I also checked with a proxy.

Thank you !

[codeclimate[bot]]

Code Climate has analyzed commit a07c9330 and detected 43 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Duplication	4
Style	1
Complexity	38

The test coverage on the diff in this pull request is 66.6% (50% is the threshold).

This pull request will bring the total coverage in the repository to 92.3% (0.2% change).

View more on Code Climate.