Allow custom settings for https-listener while using undertow::https type

[JannikJ]

Currently, it is not possible to use both the undertow::https type and configure the https-listener because this type already uses this resource. With this merge, the parameter https_listener_content is added where a custom configuration can be made. This configuration may be overwritten, e.g. the security-realm is 'TLSRealm' and cannot be changed with this new parameter.

[coveralls]

Coverage remained the same at 74.854% when pulling 12bc17bf437466fc4a0a95b07e5c47b9d0c4000d on JannikJ:master into 4c118ffea26a49eb6d7174f8c0a1eec31d440790 on biemond:master.

[coveralls]

Coverage remained the same at 74.854% when pulling 12bc17bf437466fc4a0a95b07e5c47b9d0c4000d on JannikJ:master into 4c118ffea26a49eb6d7174f8c0a1eec31d440790 on biemond:master.

[coveralls]

Coverage remained the same at 74.854% when pulling d071d1e60ab3f2df27c7aec6fe7f044267dd9cda on JannikJ:master into 4c118ffea26a49eb6d7174f8c0a1eec31d440790 on biemond:master.