Tests

Improve pdf content parser for DOIs #18645

Job	Run time
OpenRewrite	2m 28s
CHANGELOG.md	10s
Markdown	5s
Checkstyle	2m 5s
Modernizer	1m 27s
CHANGELOG.md - only unreleased touched	16s
Code coverage	35s
Database tests	2m 37s
Validate Gradle Wrapper	5s
GUI tests	1m 34s
Find merge conflicts	4s
Source branch is other than "main"	1s
Validate requiremenet coverage	23s
Unit tests	6m 42s
upload-pr-number	4s
	18m 36s

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