Revert "Support force update quota"

This reverts commit e8b665edbfcd86488f75ed0b79dafdedbf8f5950.

The previous commit created an incompatibility in using new nova
client with older nova server. Nova client needs to be always
releasable, and work with all nova server API versions out there.

Fixes bug #1173353

Change-Id: I2c07d109af4a35bc3b98dedaf991d5d3cc6fdd3b