Create config module
Add config.configure.ejtpd function
Add config.test_filenames(filenames)
config.test_filenames accept an env_var parameter
Add config.configure_identity_cache method
Fix ejtp-console and tests
Use config methods in ejtp-console
Move ejtp-console configuration to config module
Fix py3k tests in config module
Remove useless import and replace cache with self._cache
Merge branch 'development' of github.com:campadrenalin/EJTP-lib-python into development