reduce java packages to java-archive and jenkins-plugin

integration/test-fixtures/.gitignore

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+# we should strive to not commit blobs to the repo and strive to keep the build process of how blobs are acquired in-repo.
+# this blob is generated from imgbom/imgbom/catalogers/java/test-fixtures/java-builds , however, preserving the build process
+# twice in the repo seems redundant (even via symlink). Given that the fixture is a few kilobytes in size, the build process is already
+# captured, and integration tests should only be testing if jars can be discovered (not necessarily depth in java detection
+# functionality), committing it seems like an acceptable exception.
+!image-pkg-coverage/java/*.jar
+!image-pkg-coverage/java/*.hpi

integration/test-fixtures/image-pkg-coverage/java/generate-fixtures.md

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+See the imgbom/cataloger/java/test-fixtures/java-builds dir to generate test fixtures and copy to here manually.