Imports of package testing

PathSynopsis
github.com/google/gnostic-models/openapiv2
github.com/google/gnostic-models/openapiv3
osPackage os provides a platform-independent interface to operating system functionality.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.