System properties mechanism doesn't work from included files

[marcinkp]

Describe the bug Substitution is not resolved for properties withing included configuration

To Reproduce Steps to reproduce the behavior:

1. In application conf define

   global {
   profile{
   include required("includes/profile-active.conf")
   }
   }
   ...
   config.server.options.config {
   somevalue = ${global.profile.somevalue}
   }

2. profile-active.conf has:

   somevalue =  ${custom.system.property}

3. Execute

   ./bin/knotx.bat run-knotx -Dcustom.system.property=myvalue

4. See error

Could not resolve substitution to a value: ${global.profile.custom.system.property}

[tomaszmichalak]

@marcinkp Can you please implement Unit test?

[marcinkp]

In fact it is not an issue. Its specific HOCON implementation. See: https://github.com/lightbend/config/blob/master/HOCON.md#include-semantics-substitution

I prepared unit test which cover this scenario.