'm1.tiny' now has root_gb=1

`root_gb=0` indicates that a disk-resize shouldn't occur which is not
something that a default flavor should have enabled. This is
especially true of one named 'tiny' since the unresized image could
potentially be very large, leading to the unexpected result of a
'tiny' instance consuming a massive amount of disk.

The no-resize behavior is still supported, so if it's being relied on
for testing, additional, non-default flavors can still be created that
enable it.

DocImpact
Fixes bug 1175383

Change-Id: Ifa5827c7f87dae95214bc4a585adce5735a05d83
Fix require_context() decorators.

require_context() and require_admin_context() decorators
don't copy attributes of a decorated function (func_name,
__doc__, __module__) to a wrapper function. This makes
introspection and debugging harder and should be fixed.

Fixes bug 1181606.

Change-Id: I0926df92a40d3fc09b94a0c4b1ded63039abf18b
Merge "Fix require_context() decorators."
Merge "'m1.tiny' now has root_gb=1"