Synnefo

improve pep8 compliance

allow overlimit entities to release resources

When a resource holding is found with quantity exceeding its capacity,
it cannot allocate any more quantities,
but it should be able to release quantities.
However, if even after the release the quantity remained...

wip Use decimals to store quota values; infinite quotas no more supported

Set default quota values in _increase_resource

New add_quota API to handle infinity

Separately handle subtractions and additions of quotas
Adapt get_diff_quota plus various bug fixes

Record arguments of add_quota and return them in ack_serial

add_quota API call

Make side-effecting quotaholder API calls fail completely,
if part of the request is rejected.

If such a call returns a non-empty list, this means that
the entire call failed due to the actions mentioned in the list.

Simplify set_quota implementation

fix obscure bug in callpoint class that triggered db integrity errors

Callpoint class had a placeholder attribute original_calls
which was initialized as an empty dictionary,
and thus was usable. Class init() code did not initialize
original_calls as it should but because the placeholder was...

make quotaholder token a required setting

Implement reset_holding API call

Remove quotaholder migrations

Check for pending commissions per entity, resource

set quotaholder urls

- quotaholder base url is of the form 'http://host/quotaholder/v/'
- cyclades setting name set to CYCLADES_QUOTAHOLDER_URL

Remove a print

Implement release_holding

API call to set the whole holding.

Do not allow duplicate provisions in a commission.

Move commissioning into snf-common.

Rename in fixtures.