Scott Frederick 8f5ef951de Use current timestamp for index files with Gradle
This commit removes changes the timestamp used when writing the
classpath and layers index files in the Gradle plugin to be the
current timestamp unless `preserveFileTimestamps=true`. It also
polishes some duplication in the handling of entry attributes
when creating the fat archive and adds a test to verify that
the Gradle plugin uses the same fixed timestamp constant as
Gradle uses internally.

See gh-21005
2020-04-23 16:05:32 -05:00
..