quarkus-oidc does not build final redirect uri with https when using force-redirect-https-scheme=true

[funcbro]

Describe the bug
When using quarkus:oidc with "quarkus.oidc.authentication.force-redirect-https-scheme=true" the final redirect uri is created with http instead of https.
After authentication via an oidc provider the final redirect points to an non-existent http adress.
Authentication is still successful. When manually correcting the url to https, one can access the protected endpoints.

Quarkus Service runs in a container on http port in OpenShift.
The Routing adds ssl security.

see https://github.com/quarkusio/quarkus/blob/master/extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/CodeAuthenticationMechanism.java#L410

private String buildUri(RoutingContext context, boolean forceHttps, String path) {
        final String scheme = forceHttps ? "https" : context.request().scheme();
        return new StringBuilder(scheme).append("://")
                .append(URI.create(context.request().absoluteURI()).getAuthority())
                .append(path)
                .toString();
    }

    private String buildUriWithoutQueryParams(RoutingContext context) {
        URI absoluteUri = URI.create(context.request().absoluteURI());
        return new StringBuilder(context.request().scheme()).append("://")
                .append(absoluteUri.getAuthority())
                .append(absoluteUri.getRawPath())
                .toString();
    }

--> https configuration is only used in buildUri(), but not in buildUriWithoutQueryParams()

Expected behavior
https is used instead of http for:

1. redirect_uri when calling oidc-provider
2. after authentication for local redirect requests in quarkus e.g. when redirecting back to the original url.

Actual behavior

1. redirect_uri for oidc-provider is https -> everything fine
2. Final redirect URI created by CodeAuthenticationMechanism uses http instead of https
   (Describe the actual behavior clearly and concisely.)

To Reproduce
Steps to reproduce the behavior:

1. configure as specified below
2. run quarkus on http port within container and routing configuration for https
3. access service unauthorized
4. authorize
   -> redirects to https service. oidc-extension builds the final redirect uri with http resulting in redirect to nonexistent address

Configuration

quarkus.oidc.application-type=web-app
quarkus.oidc.authentication.force-redirect-https-scheme=true
quarkus.oidc.authentication.redirect-path=/
quarkus.oidc.authentication.restore-path-after-redirect=true
quarkus.oidc.authentication.remove-redirect-parameters=true

Screenshots

2020-09-16 09:33:41,005 DEBUG [io.qua.oid.run.CodeAuthenticationMechanism] (vert.x-eventloop-thread-1) Authentication request redirect_uri parameter: https://service.domain.net/ 
2020-09-16 09:33:41,006 DEBUG [io.qua.oid.run.CodeAuthenticationMechanism] (vert.x-eventloop-thread-1) q_auth cookie 'max-age' parameter is set to 1800
2020-09-16 09:33:41,007 INFO  [io.qua.htt.access-log] (vert.x-eventloop-thread-1) 10.221.13.1 - - 16/Sep/2020:09:33:41 +0000 "GET / HTTP/1.1" 302 -
2020-09-16 09:33:41,105 DEBUG [io.qua.oid.run.CodeAuthenticationMechanism] (vert.x-eventloop-thread-1) Token request redirect_uri parameter: https://service.domain.net/ 
2020-09-16 09:33:41,229 DEBUG [io.qua.oid.run.CodeAuthenticationMechanism] (vert.x-eventloop-thread-1) q_session cookie 'max-age' parameter is set to 7200
2020-09-16 09:33:41,229 DEBUG [io.qua.oid.run.CodeAuthenticationMechanism] (vert.x-eventloop-thread-1) Final redirect URI: http://service.domain.net/ 

--> Final redirect URI is http instead of https

Environment (please complete the following information):

• Output of uname -a or ver:
• Output of java -version:
  openjdk version "11.0.7" 2020-04-14
  OpenJDK Runtime Environment GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02)
  OpenJDK 64-Bit Server VM GraalVM CE 20.1.0 (build 11.0.7+10-jvmci-20.1-b02, mixed mode, sharing)
• GraalVM version (if different from Java):
• Quarkus version or git rev: 1.7.3
• Build tool (ie. output of mvnw --version or gradlew --version): 3.6.3

Additional context
(Add any other context about the problem here.)