#414 Add domain specific exceptions

...itconnect/api/exceptions/AttachmentCreationException.java

.../fitconnect/api/exceptions/AttachmentUploadException.java

...ko/fitconnect/api/exceptions/AuthenticationException.java

...nnect/api/exceptions/ClientNotAuthenticatedException.java

.../fitko/fitconnect/api/exceptions/DecryptionException.java

.../fitko/fitconnect/api/exceptions/EncryptionException.java

...ko/fitconnect/api/exceptions/InitializationException.java

.../fitconnect/api/exceptions/InvalidPublicKeyException.java

...o/fitconnect/api/exceptions/KeyNotRetrievedException.java

...itconnect/api/exceptions/MetadataNotCreatedException.java

...connect/api/exceptions/SubmissionNotCreatedException.java

...fitconnect/api/exceptions/SubmissionNotSentException.java

.../fitko/fitconnect/api/exceptions/ValidationException.java

...tconnect/api/exceptions/client/AttachmentUploadError.java

...connect/api/exceptions/client/ClientNotAuthenticated.java

...onnect/api/exceptions/client/SubmissionCreationError.java

...fitconnect/api/exceptions/client/SubmissionSendError.java