oscm proxy landing page and configuration for port 443 restricted environments

Changes in this Pull Request:

Added approval tool and controller on proxy landing page
Fixed proxy rules for rewriting HTTPS URLs as needed in restricted environments.

Mandatory checks:

[X] latest changes were fetched from the upstream branch before creating this PR (branch is up to date)
[X] changes were tested manually
[ ] communication about interdependent changes has been sent to the team (if applicable)
[ ] respective Jenkins jobs were referenced in additional context section of this PR

OSCM Build References: /Docker_OSCM/job/OSCM_Docker_Build_and_push/373/

This change is

servicecatalog / oscm-dockerbuild