[ConventionTests] Migrate old tests to PackageBuilderTester
[ConventionTests] Migrate old tests to PackageBuilderTester

apple/swift-package-manager,mxcl/swift-package-manager,JGiola/swift-package-manager,mxcl/swift-package-manager,abertelrud/swift-package-manager,apple/swift-package-manager,vmanot/swift-package-manager,mxcl/swift-package-manager,haskellswift/swift-package-manager,mxcl/swift-package-manager,JGiola/swift-package-manager,JGiola/swift-package-manager,sschiau/swift-package-manager,apple/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager,apple/swift-package-manager,vmanot/swift-package-manager,haskellswift/swift-package-manager,sschiau/swift-package-manager,abertelrud/swift-package-manager,JGiola/swift-package-manager,sschiau/swift-package-manager,sschiau/swift-package-manager,vmanot/swift-package-manager,vmanot/swift-package-manager,haskellswift/swift-package-manager,sschiau/swift-package-manager,haskellswift/swift-package-manager,JGiola/swift-package-manager,apple/swift-package-manager,vmanot/swift-package-manager