Move classes from package

[mr-zepol]

Solves https://github.com/CycloneDX/cyclonedx-core-java/issues/497

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +0.00%	:white_check_mark: ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (dde00242ae0271e38a0e4312fad0136d801f219c)	6033	4403	72.98%
Head commit (08e03f87e489973ed2069633c7c65417aec100b7)	6033 (+0)	4403 (+0)	72.98% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#501)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[nscuro]

This is also a breaking change, so let's include this in the next major version, together with #486.