Fixed Console Runner

- after moved ConfigFilePathDefaultValue constant to SolutionValidatorEnvironment
- after Context was introduced and repoRootPath moved to Context
Refactored unit tests to use *.csprojfortest extension
Fixed RepositoryRootPath property

- after Context was introduced and repoRootPath moved to Context. Original repoRootPath was expected to contain and contained the normalized full path to the repo root.
Merged with master