cyclades: Fixes for the new console actions

Fix wrong import and avoid importing the target view by using a string
argument to the 'reverse' function, containing the Python path to the
view object.
cyclades: Fix testcase
cyclades: Fix bug in calculation of quotas

Count all instance's volumes if the server's operstate is 'ERROR'.
pithos: Fix sqlite backend

Related commit:https://github.com/papagian/synnefo/commit/6b3f6caee75841e59cc83e1fa6076261cb462c44