Set default data type to unknown

[Lagovas]

• Use Unknown as default data_type
• Add unit-tests that verifies that cannot be defined token_type together with data_type
• move conversation from TokenType to EncryptedType from pseudonymization package to encryptor/config/common that responsible for EncryptedType

Checklist

• [+] Change is covered by automated tests
• [+] The coding guidelines are followed
• [+] Public API has proper documentation in the Acra documentation site or has PR on documentation repository
  with new changes
• [+] CHANGELOG.md is updated (in case of notable or breaking changes)
• [+] CHANGELOG_DEV.md is updated
• [+] Benchmark results are attached (if applicable)
• [+] Example projects and code samples are up-to-date (in case of API changes)

[Zhaars]

Lgtm

[G1gg1L3s]

Cool!