adds unit tests for fieldmapping
adds unit tests for field mappers
refactors and removes fieldMapper components specific to data source
refactors and adds unit tests for log config classes
adds unit-test for log readers
adds interface and abstract classes of readers; and reader unit-test
makes refactoring on the class ReaderMysql and others
adds implementation of ReaderMongodb and EntriesMongodb classes
makes text file readers disabled
authentication service added
added CREDENTIAL_ID for response authentication
fixes some issues about CRUD of projects