Validate gradle/wrapper/gradle-wrapper.properties:

1. Assume distributionUrl points to a canonical Gradle location. If the link is not listed in https://services.gradle.org/versions/all, then fail the validation.
2. For those who want a customized Gradle distribution, add skip-distribution-validation: true|false configuration option (default: false)
3. Enforce the valid distributionSha256Sum for the official distributions