Add a tool that checks that configuration file is valid

[miovd]

• Do you want to request a feature or report a bug?
  Feature

• What is the current behavior?
  When there is an error in the configuration file (a misplaced space or tab), no convenient error message is returned, some properties/modules are just not read correctly.

• Please provide the steps to reproduce and if possible a minimal demo of the problem
  Create your yaml configuration file with incorrect indents (mix between spaces and tabs) and you will run into issues that do not exactly state the issue

• What is the expected behavior?
  It should be possible in some way to check that the modules/properties of a configuration file are correct.

• What is the motivation / use case for changing the behavior?
  YAML format is prone to indent errors.

• Please tell us about your environment:

  • PowSyBl Version: 3.3.0-SNAPSHOT
  • OS Version: *