Tarball manifest.json has incorrect key capitalization

[ctimmins]

Environment:

• Jib version: v2.x
• Build tool: Gradle 5.2.1
• OS: MacOS 10.15

Description of the issue:
manifest.json inside jib image tarball has incorrect capitalization

Expected behavior:
manifest.json should contain key "RepoTags". instead it contains "repoTags".
Technically it is expected to be "repoTags" according to this test but I have always seen "RepoTags" in manifest

Steps to reproduce:

1. ./gradlew jibBuildTar
2. cd <buildDir> && tar -xvf jib-image.tar
3. manifest.json will have a key repoTags

Notes
source pojo

I think adding @JsonProperty("RepoTags") could fix the issue

[chanseokoh]

Thanks for reporting. Not just RepoTags but Config and Labels, I think.

[chanseokoh]

@ctimmins Jib 2.3.0 is released with this fix!