Make Camayoc configurable

[elyezer]

A configuration file will help Camayoc know which application it is testing (RHO or Sonar), the application version (it should no rely on the version that the application under testing provides) and it needs to know which are the machines available so it can run tests on RHEL7, for example, only if that system is available.

The configuration will also tell Camayoc where the application under testing is available (localhost or remote host).

The configuration file can be named as camayoc.yaml or camayoc.yml and its discovery will follow this order:

• Path defined by the environment variable CAMAYOC_CONFIG. It can be either relative or absolute path
• Current working directory
• Directories defined by the XDG Base Directory Specification (https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html)

The first config file found will be used and the search will stop.