gradle-scripts Introduce bomGroups property

bomGroups property is for specifying subprojects. it is used with bom flag.

// project tree module1 |- submodule1 |- submodule2 module2 |- submodule1 |- submodule2

settings.gradle

includeWithFlags ':module1', 'bom'
includeWithFlags ':module1:submodule1', 'java', 'publish'
includeWithFlags ':module1:submodule2', 'java', 'publish'

includeWithFlags ':module2', 'bom'
includeWithFlags ':module2:submodule1', 'java', 'publish'
includeWithFlags ':module2:submodule2', 'java', 'publish'

build.gradle

ext {
    bomGroups = [
            ':module1': [':module1:submodule1', ':module1:submodule2'],
            ':module2': [':module2:submodule1', ':module2:submodule2']
    ]
}

When I create module2 bom, module1's subprojects will be added to the pom file as a dependency. If use bomGroups property, module1's submodules won't be added to the module2's pom file.