Add config argument to more password.Password invocations. The work done to allow password_pbkdf2_default_rounds to be overridden for testing requires that calls to password.Password include a config argument. This was needed because using the real value more than quadrupled testing runtime. However there are still a few places where config was not being set when Password was called. I think this fixes all of the ones that are called from a function that have access to a db.config object. The remaining ones all call Password(encrypted=x). This results in Password.unpack() being called. If x is not a propertly formatted password string ("{scheme}...", it calls encodePassword. It then should end up raising the ConfigNotSet exception. This is probably what we want as it means the shape of "x" is not correct. I don't understand why Password.unpack() attempts to encrypt the value of encrypted if it doesn't match the right form. According to codecov, this encryption branch is being used, so somewhere x is of the wrong form. Hmmm....

''' Wrapper for getargspec to support other callables and python 3 support

In python 3 just uses getfullargspec which handles regular functions
and classes with __call__ methods.
'''

try:
    # Python 3+
    from inspect import getfullargspec as getargspec
    findargspec = getargspec
except ImportError:
    # Python 2.5-2.7 modified from https://bugs.python.org/issue20828
    import inspect

    def findargspec(fn):
        if inspect.isfunction(fn) or inspect.ismethod(fn):
            inspectable = fn
        elif inspect.isclass(fn):
            inspectable = fn.__init__
        elif callable(fn):
            inspectable = fn.__call__
        else:
            inspectable = fn

        try:
            return inspect.getargspec(inspectable)
        except TypeError:
            raise