Fix slapos egg test failures
@rafael @vpelletier @alain.takoudjou
These are fixes for the following egg test failures:
ERROR: test_schema_caucase_instance_caucase_input_schema_json (slapos.test.test_json_schema.TestJSONSchemaValidation)
ERROR: test_correct_naming (test_slaposconfiguration.SlapConfigurationTest)
Test correct naming of variables from resource file.