Correctly cleanup path for category setter
Directly use WorkflowTool to access time value.

Mixed commit:

  43b1ae1bc46b453e4553a9bc1077fe86e5db13bb
  2f05fe1b585d3ca736538b32269d36a410f5f7da
Force UTC usage.

PayZen interface expectes all dates in UTC, but suds library is not configurable.
So force UTC usage while importing and using suds, so no date mangling will happen.

Conflicts:
	bt5/erp5_payzen_secure_payment/bt/revision
Implement cancellation.

Conflicts:
	bt5/erp5_payzen_secure_payment/bt/revision
Prevent more security checking.

Calling an external python will prevent calling navigate from a python script
with a proxy role.

Conflicts:
	bt5/erp5_payzen_secure_payment/bt/revision
Remove duplicated parameter of memcached_url