Fix Azure v2 profile method

[salty-horse]

This fixes #27.

A few things I'm unsure of:

1. Passing in your own claims_options will break profile(). Is this OK?
2. profile() really only accepts token and nonce, but I left the signature as **kwargs because that's its signature elsewhere.
3. profile() returns a dictionary with the all of the ID token claims. These are more more fields than would be returned by a call to userinfo. Should I return only specific fields?

Tested with:

KEY = ''
PASS = ''
CODE = ''

from loginpass.azure import create_azure_backend
Azure = create_azure_backend('azure', 'common', version=2)
oauth_client = Azure(KEY, PASS, **Azure.OAUTH_CONFIG)
access_token_info = oauth_client.fetch_access_token(code=CODE)
profile = oauth_client.profile(access_token_info)
print(profile)