Add show_nested to count_stacks RPC interface

blueprint: list-nested
Change-Id: I60c25a34009028d45d73a10fe372abdf28ef043f
Add show_nested parameter to GET v1/stacks API

Adds an optional argument which can be used to enable listing of
all stacks, including nested stacks

blueprint: list-nested
Change-Id: I6546ddc549cb3eec769698f5b7ff2a921c2b31d7
Merge "Add show_nested to count_stacks RPC interface"
Merge "Add show_nested parameter to GET v1/stacks API"