Provides stubs for os, sys and subprocess for testing
 
This test allows one to test code that itself uses os, sys, and subprocess.

Modules
		os re sys shlex

Classes
		__builtin__.object AdbCommandsModuleStub OsModuleStub Override SubprocessModuleStub SysModuleStub   class AdbCommandsModuleStub(__builtin__.object)       Methods defined here: GetAttachedDevices(self) __init__(self) Static methods defined here: HasForwarder(_=None) IsAndroidSupported() Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined) Data and other attributes defined here: AdbCommandsStub = <class 'telemetry.unittest.system_stub.AdbCommandsStub'>   class OsModuleStub(__builtin__.object)       Methods defined here: __init__(self, sys_module=<module 'sys' (built-in)>) getenv(self, name) Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined) Data and other attributes defined here: OsPathModuleStub = <class 'telemetry.unittest.system_stub.OsPathModuleStub'>   class Override(__builtin__.object)       Methods defined here: Restore(self) __del__(self) __init__(self, base_module, module_list) Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined)   class SubprocessModuleStub(__builtin__.object)       Methods defined here: __init__(self) call(self, *args, **kwargs) Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined) Data and other attributes defined here: PopenStub = <class 'telemetry.unittest.system_stub.PopenStub'>   class SysModuleStub(__builtin__.object)       Methods defined here: __init__(self) Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined)