Rename +junit meta to +tests

See #1869, release log:

• 9d786b1 by @rultor: Merge branch '__rultor'
• f2d1209 by @renovate[bot]: fix(deps): update dependency o...
• b44b8b0 by @renovate[bot]: fix(deps): update dependency o...
• b6c2e15 by @rultor: Merge branch '__rultor'
• 5147a02 by @renovate[bot]: fix(deps): update dependency o...
• cf86050 by @renovate[bot]: chore(deps): update dependency...
• 2c38ea1 by @rultor: Merge branch '__rultor'
• 3b18ab7 by @rultor: Merge branch '__rultor'
• 988d3db by @yegor256: Merge pull request #2050 from ...
• b909925 by @rultor: Merge branch '__rultor'
• 27ed9b1 by @Graur: #1885 - fixed checkstyle
• 6851a2d by @Graur: #1885 - triple quotes works co...
• 62aaa38 by @mximp: Disable IT tests guideline
• 2d922e3 by @volodya-lombrozo: feat(#2046): remove redundant ...
• 4827fdf by @volodya-lombrozo: feat(#2046): Disable removing ...
• 33edc2b by @volodya-lombrozo: feat(#2046): move javadoc plug...
• 6700154 by @volodya-lombrozo: feat(#2046): Specify javadoc s...
• 92a46f6 by @volodya-lombrozo: feat(#2017): cleanup .gitignor...
• 6eba497 by @rultor: Merge branch '__rultor'
• c4a91a3 by @yegor256: cache dir
• and 216 more...

Released by Rultor 1.74.7, see build log