* #1627 Replace BCryptService with Maven dependency
- Remove BCryptService in favor of a better BCrypt implementation (Maven dependency)
- Introduce BCryptHasher wrapping the dependency with more suitable methods
- Fix inaccurate details about salt length in docu annotation: for BCrypt it's always 22 chars
- Change phpBB hash to produce 2y hashes instead of 2a
* #1627 Use UTF-8 encoding when (dis)assembling Strings
* #1627 Small test additions
- Remove redundant uses of WrapperMock
- Use assertThat() from JUnit, not hamcrest
- Use hamcrest Matchers everywhere (not BaseMatchers etc.)
- Favor Mockito's argThat() over using ArgumentCaptor (more succinct)
- Delete useless test classes