Remove unused and conflicting dependency on securemock in unit tests

Remove unused and conflicting dependency on securemock in unit tests

securemock is a fork of an old version of mockito. By removing it
some tests must be fixed to correctly support the latest version of
mockito:
- signature of ArgumentMatcher implementations (Object -> T). That's the
reason why they have been fixed and replaced by lambda
- any(Class) supports null values in securemock but not in mockito.
Replacing calls by any() fixes the issue.