[proxy] introduce OIDC integration types [THREESCALE-2665]

[mikz]

What this PR does / why we need it:

Adds a select box for user chose if they are using Keycloak or Generic HTTP adapter for the OIDC sync integration.

[hallelujah]

Generally approve, small changes

[hallelujah]

Documentation change then it will be complete

[hallelujah]

We should add it to the documentation

porta/app/controllers/admin/api/services/proxies_controller.rb

Line 56 in fc67250

##~ op.parameters.add name: "oidc_issuer_endpoint", description: "Location of your OpenID Provider.", dataType: "string", paramType: "query", required: false

[codecov]

Codecov Report

Merging #829 into master will decrease coverage by 0.63%.
The diff coverage is 90%.

@@            Coverage Diff            @@
##           master    #829      +/-   ##
=========================================
- Coverage   92.94%   92.3%   -0.64%     
=========================================
  Files        2421    2318     -103     
  Lines       78659   73882    -4777     
=========================================
- Hits        73107   68195    -4912     
- Misses       5552    5687     +135

Impacted Files	Coverage Δ
...ntrollers/admin/api/services/proxies_controller.rb	100% <ø> (ø)	⬆️
app/representers/proxy_representer.rb	100% <100%> (ø)	⬆️
test/unit/proxy_test.rb	100% <100%> (ø)	⬆️
app/controllers/api/integrations_controller.rb	75.36% <100%> (+0.54%)	⬆️
app/models/proxy.rb	97.27% <80%> (-0.28%)	⬇️
app/lib/logic/nginx_proxy.rb	27.27% <0%> (-72.73%)	⬇️
lib/last_traffic.rb	33.33% <0%> (-66.67%)	⬇️
lib/range_hacks.rb	37.5% <0%> (-62.5%)	⬇️
...provider/admin/api_docs/account_data_controller.rb	40% <0%> (-60%)	⬇️
app/mailers/data_export_mailer.rb	40% <0%> (-60%)	⬇️
... and 201 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 79c87d2...924a4e0. Read the comment docs.