The correct way to override the plugins repo is through the pluginManagement
section in the gradle settings file. Also make use of the gradle.properties
file to initialize repositoryUrl and also publishUrl so we don't have to mess
around with finding and assigning them in the main gradle file.
The lock files are also updated.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=233810854